Home / 20,678.20-28,535.55-11,246.71

Finding the Fourth Proportional to 20,678.20, 28,535.55 and 11,246.71

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Solution

The fourth proportional to 20,678.20, 28,535.55 and 11,246.71 is: 15,520.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.20 : 28,535.55 = 11,246.71 : x
  2. Step 2: Convert to fraction form
    20,678.20/28,535.55 = 11,246.71/x
  3. Step 3: Cross multiply
    20,678.20x = 28,535.55 × 11,246.71
  4. Step 4: Simplify right side
    20,678.20x = 320,931,055.54
  5. Step 5: Solve for x
    x = 320,931,055.54/20,678.20
  6. Step 6: Final answer
    x = 15,520.26

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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.