Home / 47,987.40-71,981.10-31,366.20

Finding the Fourth Proportional to 47,987.40, 71,981.10 and 31,366.20

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Solution

The fourth proportional to 47,987.40, 71,981.10 and 31,366.20 is: 47,049.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,987.40 : 71,981.10 = 31,366.20 : x
  2. Step 2: Convert to fraction form
    47,987.40/71,981.10 = 31,366.20/x
  3. Step 3: Cross multiply
    47,987.40x = 71,981.10 × 31,366.20
  4. Step 4: Simplify right side
    47,987.40x = 2,257,773,578.82
  5. Step 5: Solve for x
    x = 2,257,773,578.82/47,987.40
  6. Step 6: Final answer
    x = 47,049.30

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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.