Home / 31,522.40-47,221.20-20,436.80

Finding the Fourth Proportional to 31,522.40, 47,221.20 and 20,436.80

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Solution

The fourth proportional to 31,522.40, 47,221.20 and 20,436.80 is: 30,614.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,522.40 : 47,221.20 = 20,436.80 : x
  2. Step 2: Convert to fraction form
    31,522.40/47,221.20 = 20,436.80/x
  3. Step 3: Cross multiply
    31,522.40x = 47,221.20 × 20,436.80
  4. Step 4: Simplify right side
    31,522.40x = 965,050,220.16
  5. Step 5: Solve for x
    x = 965,050,220.16/31,522.40
  6. Step 6: Final answer
    x = 30,614.74

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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.