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Finding the Fourth Proportional to 15,685, 23,538.30 and 6,451

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Solution

The fourth proportional to 15,685, 23,538.30 and 6,451 is: 9,680.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,685 : 23,538.30 = 6,451 : x
  2. Step 2: Convert to fraction form
    15,685/23,538.30 = 6,451/x
  3. Step 3: Cross multiply
    15,685x = 23,538.30 × 6,451
  4. Step 4: Simplify right side
    15,685x = 151,845,573.30
  5. Step 5: Solve for x
    x = 151,845,573.30/15,685
  6. Step 6: Final answer
    x = 9,680.94

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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.