Home / 28,134.79-38,824.57-15,385.49

Finding the Fourth Proportional to 28,134.79, 38,824.57 and 15,385.49

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Solution

The fourth proportional to 28,134.79, 38,824.57 and 15,385.49 is: 21,231.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,134.79 : 38,824.57 = 15,385.49 : x
  2. Step 2: Convert to fraction form
    28,134.79/38,824.57 = 15,385.49/x
  3. Step 3: Cross multiply
    28,134.79x = 38,824.57 × 15,385.49
  4. Step 4: Simplify right side
    28,134.79x = 597,335,092.09
  5. Step 5: Solve for x
    x = 597,335,092.09/28,134.79
  6. Step 6: Final answer
    x = 21,231.19

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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.