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Finding the Fourth Proportional to 14,053.78, 21,070.29 and 8,505.90

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Solution

The fourth proportional to 14,053.78, 21,070.29 and 8,505.90 is: 12,752.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,053.78 : 21,070.29 = 8,505.90 : x
  2. Step 2: Convert to fraction form
    14,053.78/21,070.29 = 8,505.90/x
  3. Step 3: Cross multiply
    14,053.78x = 21,070.29 × 8,505.90
  4. Step 4: Simplify right side
    14,053.78x = 179,221,737.18
  5. Step 5: Solve for x
    x = 179,221,737.18/14,053.78
  6. Step 6: Final answer
    x = 12,752.57

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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.