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Finding the Fourth Proportional to 45,887.61, 68,831.42 and 12,611.19

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Solution

The fourth proportional to 45,887.61, 68,831.42 and 12,611.19 is: 18,916.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,887.61 : 68,831.42 = 12,611.19 : x
  2. Step 2: Convert to fraction form
    45,887.61/68,831.42 = 12,611.19/x
  3. Step 3: Cross multiply
    45,887.61x = 68,831.42 × 12,611.19
  4. Step 4: Simplify right side
    45,887.61x = 868,046,115.59
  5. Step 5: Solve for x
    x = 868,046,115.59/45,887.61
  6. Step 6: Final answer
    x = 18,916.79

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Similar ratio
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1.5x scale

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.