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Finding the Fourth Proportional to 22,379.66, 30,867.15 and 21,387.02

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Solution

The fourth proportional to 22,379.66, 30,867.15 and 21,387.02 is: 29,498.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,379.66 : 30,867.15 = 21,387.02 : x
  2. Step 2: Convert to fraction form
    22,379.66/30,867.15 = 21,387.02/x
  3. Step 3: Cross multiply
    22,379.66x = 30,867.15 × 21,387.02
  4. Step 4: Simplify right side
    22,379.66x = 660,156,354.39
  5. Step 5: Solve for x
    x = 660,156,354.39/22,379.66
  6. Step 6: Final answer
    x = 29,498.05

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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.