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Finding the Fourth Proportional to 15,503.28, 21,394.95 and 9,531.55

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Solution

The fourth proportional to 15,503.28, 21,394.95 and 9,531.55 is: 13,153.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.28 : 21,394.95 = 9,531.55 : x
  2. Step 2: Convert to fraction form
    15,503.28/21,394.95 = 9,531.55/x
  3. Step 3: Cross multiply
    15,503.28x = 21,394.95 × 9,531.55
  4. Step 4: Simplify right side
    15,503.28x = 203,927,035.67
  5. Step 5: Solve for x
    x = 203,927,035.67/15,503.28
  6. Step 6: Final answer
    x = 13,153.80

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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.