Home / 20,854.28-31,278.10-6,814.18

Finding the Fourth Proportional to 20,854.28, 31,278.10 and 6,814.18

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Solution

The fourth proportional to 20,854.28, 31,278.10 and 6,814.18 is: 10,220.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.28 : 31,278.10 = 6,814.18 : x
  2. Step 2: Convert to fraction form
    20,854.28/31,278.10 = 6,814.18/x
  3. Step 3: Cross multiply
    20,854.28x = 31,278.10 × 6,814.18
  4. Step 4: Simplify right side
    20,854.28x = 213,134,603.46
  5. Step 5: Solve for x
    x = 213,134,603.46/20,854.28
  6. Step 6: Final answer
    x = 10,220.19

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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.