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Finding the Fourth Proportional to 22,987.40, 34,394.70 and 20,913.80

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Solution

The fourth proportional to 22,987.40, 34,394.70 and 20,913.80 is: 31,292.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,987.40 : 34,394.70 = 20,913.80 : x
  2. Step 2: Convert to fraction form
    22,987.40/34,394.70 = 20,913.80/x
  3. Step 3: Cross multiply
    22,987.40x = 34,394.70 × 20,913.80
  4. Step 4: Simplify right side
    22,987.40x = 719,323,876.86
  5. Step 5: Solve for x
    x = 719,323,876.86/22,987.40
  6. Step 6: Final answer
    x = 31,292.09

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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.