Home / 31,591.20-47,386.80-21,146.40

Finding the Fourth Proportional to 31,591.20, 47,386.80 and 21,146.40

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Solution

The fourth proportional to 31,591.20, 47,386.80 and 21,146.40 is: 31,719.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,591.20 : 47,386.80 = 21,146.40 : x
  2. Step 2: Convert to fraction form
    31,591.20/47,386.80 = 21,146.40/x
  3. Step 3: Cross multiply
    31,591.20x = 47,386.80 × 21,146.40
  4. Step 4: Simplify right side
    31,591.20x = 1,002,060,227.52
  5. Step 5: Solve for x
    x = 1,002,060,227.52/31,591.20
  6. Step 6: Final answer
    x = 31,719.60

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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.