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Finding the Fourth Proportional to 18,687,618.30, 28,031,427.45 and 18,687,618.30

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Solution

The fourth proportional to 18,687,618.30, 28,031,427.45 and 18,687,618.30 is: 28,031,427.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687,618.30 : 28,031,427.45 = 18,687,618.30 : x
  2. Step 2: Convert to fraction form
    18,687,618.30/28,031,427.45 = 18,687,618.30/x
  3. Step 3: Cross multiply
    18,687,618.30x = 28,031,427.45 × 18,687,618.30
  4. Step 4: Simplify right side
    18,687,618.30x = 523,840,616,589,742.31
  5. Step 5: Solve for x
    x = 523,840,616,589,742.31/18,687,618.30
  6. Step 6: Final answer
    x = 28,031,427.45

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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.