Home / 20,691.45-31,012.87-9,574.66

Finding the Fourth Proportional to 20,691.45, 31,012.87 and 9,574.66

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Solution

The fourth proportional to 20,691.45, 31,012.87 and 9,574.66 is: 14,350.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.45 : 31,012.87 = 9,574.66 : x
  2. Step 2: Convert to fraction form
    20,691.45/31,012.87 = 9,574.66/x
  3. Step 3: Cross multiply
    20,691.45x = 31,012.87 × 9,574.66
  4. Step 4: Simplify right side
    20,691.45x = 296,937,685.87
  5. Step 5: Solve for x
    x = 296,937,685.87/20,691.45
  6. Step 6: Final answer
    x = 14,350.74

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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.