Home / 31,420.20-43,358.58-20,073.72

Finding the Fourth Proportional to 31,420.20, 43,358.58 and 20,073.72

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Solution

The fourth proportional to 31,420.20, 43,358.58 and 20,073.72 is: 27,700.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,420.20 : 43,358.58 = 20,073.72 : x
  2. Step 2: Convert to fraction form
    31,420.20/43,358.58 = 20,073.72/x
  3. Step 3: Cross multiply
    31,420.20x = 43,358.58 × 20,073.72
  4. Step 4: Simplify right side
    31,420.20x = 870,367,994.52
  5. Step 5: Solve for x
    x = 870,367,994.52/31,420.20
  6. Step 6: Final answer
    x = 27,700.91

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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.