Home / 20,781.52-28,678.46-11,350.08

Finding the Fourth Proportional to 20,781.52, 28,678.46 and 11,350.08

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Solution

The fourth proportional to 20,781.52, 28,678.46 and 11,350.08 is: 15,663.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.52 : 28,678.46 = 11,350.08 : x
  2. Step 2: Convert to fraction form
    20,781.52/28,678.46 = 11,350.08/x
  3. Step 3: Cross multiply
    20,781.52x = 28,678.46 × 11,350.08
  4. Step 4: Simplify right side
    20,781.52x = 325,502,815.28
  5. Step 5: Solve for x
    x = 325,502,815.28/20,781.52
  6. Step 6: Final answer
    x = 15,663.09

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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.