Home / 31,771.20-47,613.60-21,211.20

Finding the Fourth Proportional to 31,771.20, 47,613.60 and 21,211.20

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Solution

The fourth proportional to 31,771.20, 47,613.60 and 21,211.20 is: 31,787.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,771.20 : 47,613.60 = 21,211.20 : x
  2. Step 2: Convert to fraction form
    31,771.20/47,613.60 = 21,211.20/x
  3. Step 3: Cross multiply
    31,771.20x = 47,613.60 × 21,211.20
  4. Step 4: Simplify right side
    31,771.20x = 1,009,941,592.32
  5. Step 5: Solve for x
    x = 1,009,941,592.32/31,771.20
  6. Step 6: Final answer
    x = 31,787.96

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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.