Home / 20,590.30-28,414.65-11,158.86

Finding the Fourth Proportional to 20,590.30, 28,414.65 and 11,158.86

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Solution

The fourth proportional to 20,590.30, 28,414.65 and 11,158.86 is: 15,399.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,590.30 : 28,414.65 = 11,158.86 : x
  2. Step 2: Convert to fraction form
    20,590.30/28,414.65 = 11,158.86/x
  3. Step 3: Cross multiply
    20,590.30x = 28,414.65 × 11,158.86
  4. Step 4: Simplify right side
    20,590.30x = 317,075,186.93
  5. Step 5: Solve for x
    x = 317,075,186.93/20,590.30
  6. Step 6: Final answer
    x = 15,399.25

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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.