Home / 20,489.64-28,275.39-11,537.12

Finding the Fourth Proportional to 20,489.64, 28,275.39 and 11,537.12

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Solution

The fourth proportional to 20,489.64, 28,275.39 and 11,537.12 is: 15,921.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.64 : 28,275.39 = 11,537.12 : x
  2. Step 2: Convert to fraction form
    20,489.64/28,275.39 = 11,537.12/x
  3. Step 3: Cross multiply
    20,489.64x = 28,275.39 × 11,537.12
  4. Step 4: Simplify right side
    20,489.64x = 326,216,567.48
  5. Step 5: Solve for x
    x = 326,216,567.48/20,489.64
  6. Step 6: Final answer
    x = 15,921.05

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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.