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Finding the Fourth Proportional to 15,174.61, 20,951.40 and 9,511.63

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Solution

The fourth proportional to 15,174.61, 20,951.40 and 9,511.63 is: 13,132.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,174.61 : 20,951.40 = 9,511.63 : x
  2. Step 2: Convert to fraction form
    15,174.61/20,951.40 = 9,511.63/x
  3. Step 3: Cross multiply
    15,174.61x = 20,951.40 × 9,511.63
  4. Step 4: Simplify right side
    15,174.61x = 199,281,964.78
  5. Step 5: Solve for x
    x = 199,281,964.78/15,174.61
  6. Step 6: Final answer
    x = 13,132.59

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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.