Home / 31,720.20-47,580.30-19,432.20

Finding the Fourth Proportional to 31,720.20, 47,580.30 and 19,432.20

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Solution

The fourth proportional to 31,720.20, 47,580.30 and 19,432.20 is: 29,148.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,720.20 : 47,580.30 = 19,432.20 : x
  2. Step 2: Convert to fraction form
    31,720.20/47,580.30 = 19,432.20/x
  3. Step 3: Cross multiply
    31,720.20x = 47,580.30 × 19,432.20
  4. Step 4: Simplify right side
    31,720.20x = 924,589,905.66
  5. Step 5: Solve for x
    x = 924,589,905.66/31,720.20
  6. Step 6: Final answer
    x = 29,148.30

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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.