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Finding the Fourth Proportional to 21,491.58, 29,658.42 and 12,060.12

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Solution

The fourth proportional to 21,491.58, 29,658.42 and 12,060.12 is: 16,642.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,491.58 : 29,658.42 = 12,060.12 : x
  2. Step 2: Convert to fraction form
    21,491.58/29,658.42 = 12,060.12/x
  3. Step 3: Cross multiply
    21,491.58x = 29,658.42 × 12,060.12
  4. Step 4: Simplify right side
    21,491.58x = 357,684,104.21
  5. Step 5: Solve for x
    x = 357,684,104.21/21,491.58
  6. Step 6: Final answer
    x = 16,642.99

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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.