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Finding the Fourth Proportional to 28,250.30, 38,984.09 and 15,503.20

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Solution

The fourth proportional to 28,250.30, 38,984.09 and 15,503.20 is: 21,393.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,250.30 : 38,984.09 = 15,503.20 : x
  2. Step 2: Convert to fraction form
    28,250.30/38,984.09 = 15,503.20/x
  3. Step 3: Cross multiply
    28,250.30x = 38,984.09 × 15,503.20
  4. Step 4: Simplify right side
    28,250.30x = 604,377,969.11
  5. Step 5: Solve for x
    x = 604,377,969.11/28,250.30
  6. Step 6: Final answer
    x = 21,393.68

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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.