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Finding the Fourth Proportional to 21,510.96, 29,687.85 and 12,079.50

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Solution

The fourth proportional to 21,510.96, 29,687.85 and 12,079.50 is: 16,671.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,510.96 : 29,687.85 = 12,079.50 : x
  2. Step 2: Convert to fraction form
    21,510.96/29,687.85 = 12,079.50/x
  3. Step 3: Cross multiply
    21,510.96x = 29,687.85 × 12,079.50
  4. Step 4: Simplify right side
    21,510.96x = 358,614,384.08
  5. Step 5: Solve for x
    x = 358,614,384.08/21,510.96
  6. Step 6: Final answer
    x = 16,671.24

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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.