Home / 31,730.20-47,498.10-18,543.40

Finding the Fourth Proportional to 31,730.20, 47,498.10 and 18,543.40

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Solution

The fourth proportional to 31,730.20, 47,498.10 and 18,543.40 is: 27,758.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,730.20 : 47,498.10 = 18,543.40 : x
  2. Step 2: Convert to fraction form
    31,730.20/47,498.10 = 18,543.40/x
  3. Step 3: Cross multiply
    31,730.20x = 47,498.10 × 18,543.40
  4. Step 4: Simplify right side
    31,730.20x = 880,776,267.54
  5. Step 5: Solve for x
    x = 880,776,267.54/31,730.20
  6. Step 6: Final answer
    x = 27,758.30

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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.