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Finding the Fourth Proportional to 14,059.78, 21,079.16 and 8,511.79

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Solution

The fourth proportional to 14,059.78, 21,079.16 and 8,511.79 is: 12,761.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,059.78 : 21,079.16 = 8,511.79 : x
  2. Step 2: Convert to fraction form
    14,059.78/21,079.16 = 8,511.79/x
  3. Step 3: Cross multiply
    14,059.78x = 21,079.16 × 8,511.79
  4. Step 4: Simplify right side
    14,059.78x = 179,421,277.90
  5. Step 5: Solve for x
    x = 179,421,277.90/14,059.78
  6. Step 6: Final answer
    x = 12,761.32

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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.