Home / 20,590.42-28,414.86-11,158.99

Finding the Fourth Proportional to 20,590.42, 28,414.86 and 11,158.99

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Solution

The fourth proportional to 20,590.42, 28,414.86 and 11,158.99 is: 15,399.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,590.42 : 28,414.86 = 11,158.99 : x
  2. Step 2: Convert to fraction form
    20,590.42/28,414.86 = 11,158.99/x
  3. Step 3: Cross multiply
    20,590.42x = 28,414.86 × 11,158.99
  4. Step 4: Simplify right side
    20,590.42x = 317,081,138.59
  5. Step 5: Solve for x
    x = 317,081,138.59/20,590.42
  6. Step 6: Final answer
    x = 15,399.45

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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.