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Finding the Fourth Proportional to 22,689, 31,314.87 and 21,692.70

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Solution

The fourth proportional to 22,689, 31,314.87 and 21,692.70 is: 29,939.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,689 : 31,314.87 = 21,692.70 : x
  2. Step 2: Convert to fraction form
    22,689/31,314.87 = 21,692.70/x
  3. Step 3: Cross multiply
    22,689x = 31,314.87 × 21,692.70
  4. Step 4: Simplify right side
    22,689x = 679,304,080.45
  5. Step 5: Solve for x
    x = 679,304,080.45/22,689
  6. Step 6: Final answer
    x = 29,939.80

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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.