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Finding the Fourth Proportional to 15,101.76, 20,840.88 and 9,134.52

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Solution

The fourth proportional to 15,101.76, 20,840.88 and 9,134.52 is: 12,605.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,101.76 : 20,840.88 = 9,134.52 : x
  2. Step 2: Convert to fraction form
    15,101.76/20,840.88 = 9,134.52/x
  3. Step 3: Cross multiply
    15,101.76x = 20,840.88 × 9,134.52
  4. Step 4: Simplify right side
    15,101.76x = 190,371,435.18
  5. Step 5: Solve for x
    x = 190,371,435.18/15,101.76
  6. Step 6: Final answer
    x = 12,605.91

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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.