Home / 20,981.28-31,472.68-6,941.66

Finding the Fourth Proportional to 20,981.28, 31,472.68 and 6,941.66

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Solution

The fourth proportional to 20,981.28, 31,472.68 and 6,941.66 is: 10,412.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.28 : 31,472.68 = 6,941.66 : x
  2. Step 2: Convert to fraction form
    20,981.28/31,472.68 = 6,941.66/x
  3. Step 3: Cross multiply
    20,981.28x = 31,472.68 × 6,941.66
  4. Step 4: Simplify right side
    20,981.28x = 218,472,643.85
  5. Step 5: Solve for x
    x = 218,472,643.85/20,981.28
  6. Step 6: Final answer
    x = 10,412.74

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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.