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Finding the Fourth Proportional to 21,071.59, 29,079.02 and 11,640.15

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Solution

The fourth proportional to 21,071.59, 29,079.02 and 11,640.15 is: 16,063.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.59 : 29,079.02 = 11,640.15 : x
  2. Step 2: Convert to fraction form
    21,071.59/29,079.02 = 11,640.15/x
  3. Step 3: Cross multiply
    21,071.59x = 29,079.02 × 11,640.15
  4. Step 4: Simplify right side
    21,071.59x = 338,484,096.45
  5. Step 5: Solve for x
    x = 338,484,096.45/21,071.59
  6. Step 6: Final answer
    x = 16,063.53

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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.