Home / 20,678.28-28,535.70-11,246.76

Finding the Fourth Proportional to 20,678.28, 28,535.70 and 11,246.76

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Solution

The fourth proportional to 20,678.28, 28,535.70 and 11,246.76 is: 15,520.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.28 : 28,535.70 = 11,246.76 : x
  2. Step 2: Convert to fraction form
    20,678.28/28,535.70 = 11,246.76/x
  3. Step 3: Cross multiply
    20,678.28x = 28,535.70 × 11,246.76
  4. Step 4: Simplify right side
    20,678.28x = 320,934,169.33
  5. Step 5: Solve for x
    x = 320,934,169.33/20,678.28
  6. Step 6: Final answer
    x = 15,520.35

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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.