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Finding the Fourth Proportional to 11,515.52, 15,859.68 and 9,943.04

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Solution

The fourth proportional to 11,515.52, 15,859.68 and 9,943.04 is: 13,693.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,515.52 : 15,859.68 = 9,943.04 : x
  2. Step 2: Convert to fraction form
    11,515.52/15,859.68 = 9,943.04/x
  3. Step 3: Cross multiply
    11,515.52x = 15,859.68 × 9,943.04
  4. Step 4: Simplify right side
    11,515.52x = 157,693,432.63
  5. Step 5: Solve for x
    x = 157,693,432.63/11,515.52
  6. Step 6: Final answer
    x = 13,693.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.