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Finding the Fourth Proportional to 28,658.31, 42,981.76 and 14,422.99

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Solution

The fourth proportional to 28,658.31, 42,981.76 and 14,422.99 is: 21,631.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,658.31 : 42,981.76 = 14,422.99 : x
  2. Step 2: Convert to fraction form
    28,658.31/42,981.76 = 14,422.99/x
  3. Step 3: Cross multiply
    28,658.31x = 42,981.76 × 14,422.99
  4. Step 4: Simplify right side
    28,658.31x = 619,925,494.66
  5. Step 5: Solve for x
    x = 619,925,494.66/28,658.31
  6. Step 6: Final answer
    x = 21,631.61

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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.