Home / 25,428.30-38,127-11,385.72

Finding the Fourth Proportional to 25,428.30, 38,127 and 11,385.72

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Solution

The fourth proportional to 25,428.30, 38,127 and 11,385.72 is: 17,071.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,428.30 : 38,127 = 11,385.72 : x
  2. Step 2: Convert to fraction form
    25,428.30/38,127 = 11,385.72/x
  3. Step 3: Cross multiply
    25,428.30x = 38,127 × 11,385.72
  4. Step 4: Simplify right side
    25,428.30x = 434,103,346.44
  5. Step 5: Solve for x
    x = 434,103,346.44/25,428.30
  6. Step 6: Final answer
    x = 17,071.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.