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Finding the Fourth Proportional to 17,771.40, 26,721.90 and 14,920.20

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Solution

The fourth proportional to 17,771.40, 26,721.90 and 14,920.20 is: 22,434.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,771.40 : 26,721.90 = 14,920.20 : x
  2. Step 2: Convert to fraction form
    17,771.40/26,721.90 = 14,920.20/x
  3. Step 3: Cross multiply
    17,771.40x = 26,721.90 × 14,920.20
  4. Step 4: Simplify right side
    17,771.40x = 398,696,092.38
  5. Step 5: Solve for x
    x = 398,696,092.38/17,771.40
  6. Step 6: Final answer
    x = 22,434.70

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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.