Home / 20,287.64-28,001.62-13,201.76

Finding the Fourth Proportional to 20,287.64, 28,001.62 and 13,201.76

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Solution

The fourth proportional to 20,287.64, 28,001.62 and 13,201.76 is: 18,221.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,287.64 : 28,001.62 = 13,201.76 : x
  2. Step 2: Convert to fraction form
    20,287.64/28,001.62 = 13,201.76/x
  3. Step 3: Cross multiply
    20,287.64x = 28,001.62 × 13,201.76
  4. Step 4: Simplify right side
    20,287.64x = 369,670,666.85
  5. Step 5: Solve for x
    x = 369,670,666.85/20,287.64
  6. Step 6: Final answer
    x = 18,221.47

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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.