Home / 20,590.72-28,414.43-11,159.08

Finding the Fourth Proportional to 20,590.72, 28,414.43 and 11,159.08

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Solution

The fourth proportional to 20,590.72, 28,414.43 and 11,159.08 is: 15,399.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,590.72 : 28,414.43 = 11,159.08 : x
  2. Step 2: Convert to fraction form
    20,590.72/28,414.43 = 11,159.08/x
  3. Step 3: Cross multiply
    20,590.72x = 28,414.43 × 11,159.08
  4. Step 4: Simplify right side
    20,590.72x = 317,078,798.59
  5. Step 5: Solve for x
    x = 317,078,798.59/20,590.72
  6. Step 6: Final answer
    x = 15,399.11

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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.