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Finding the Fourth Proportional to 28,235.52, 38,964.96 and 15,314.88

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Solution

The fourth proportional to 28,235.52, 38,964.96 and 15,314.88 is: 21,134.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,235.52 : 38,964.96 = 15,314.88 : x
  2. Step 2: Convert to fraction form
    28,235.52/38,964.96 = 15,314.88/x
  3. Step 3: Cross multiply
    28,235.52x = 38,964.96 × 15,314.88
  4. Step 4: Simplify right side
    28,235.52x = 596,743,686.60
  5. Step 5: Solve for x
    x = 596,743,686.60/28,235.52
  6. Step 6: Final answer
    x = 21,134.50

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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.