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Finding the Fourth Proportional to 18,687,643.65, 28,031,465.49 and 18,687,643.65

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Solution

The fourth proportional to 18,687,643.65, 28,031,465.49 and 18,687,643.65 is: 28,031,465.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687,643.65 : 28,031,465.49 = 18,687,643.65 : x
  2. Step 2: Convert to fraction form
    18,687,643.65/28,031,465.49 = 18,687,643.65/x
  3. Step 3: Cross multiply
    18,687,643.65x = 28,031,465.49 × 18,687,643.65
  4. Step 4: Simplify right side
    18,687,643.65x = 523,842,038,064,392.56
  5. Step 5: Solve for x
    x = 523,842,038,064,392.56/18,687,643.65
  6. Step 6: Final answer
    x = 28,031,465.49

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Double scale
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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.