Home / 31,132.50-42,932.88-20,946.48

Finding the Fourth Proportional to 31,132.50, 42,932.88 and 20,946.48

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Solution

The fourth proportional to 31,132.50, 42,932.88 and 20,946.48 is: 28,885.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,132.50 : 42,932.88 = 20,946.48 : x
  2. Step 2: Convert to fraction form
    31,132.50/42,932.88 = 20,946.48/x
  3. Step 3: Cross multiply
    31,132.50x = 42,932.88 × 20,946.48
  4. Step 4: Simplify right side
    31,132.50x = 899,292,712.26
  5. Step 5: Solve for x
    x = 899,292,712.26/31,132.50
  6. Step 6: Final answer
    x = 28,885.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.