Home / 20,699.76-28,565.52-11,268.08

Finding the Fourth Proportional to 20,699.76, 28,565.52 and 11,268.08

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Solution

The fourth proportional to 20,699.76, 28,565.52 and 11,268.08 is: 15,549.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,699.76 : 28,565.52 = 11,268.08 : x
  2. Step 2: Convert to fraction form
    20,699.76/28,565.52 = 11,268.08/x
  3. Step 3: Cross multiply
    20,699.76x = 28,565.52 × 11,268.08
  4. Step 4: Simplify right side
    20,699.76x = 321,878,564.60
  5. Step 5: Solve for x
    x = 321,878,564.60/20,699.76
  6. Step 6: Final answer
    x = 15,549.87

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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.