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Finding the Fourth Proportional to 18,643.48, 28,004.10 and 10,867.48

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Solution

The fourth proportional to 18,643.48, 28,004.10 and 10,867.48 is: 16,323.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.48 : 28,004.10 = 10,867.48 : x
  2. Step 2: Convert to fraction form
    18,643.48/28,004.10 = 10,867.48/x
  3. Step 3: Cross multiply
    18,643.48x = 28,004.10 × 10,867.48
  4. Step 4: Simplify right side
    18,643.48x = 304,333,996.67
  5. Step 5: Solve for x
    x = 304,333,996.67/18,643.48
  6. Step 6: Final answer
    x = 16,323.88

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1.5x scale

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.