Home / 28,436.43-39,242.19-15,690.42

Finding the Fourth Proportional to 28,436.43, 39,242.19 and 15,690.42

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Solution

The fourth proportional to 28,436.43, 39,242.19 and 15,690.42 is: 21,652.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,436.43 : 39,242.19 = 15,690.42 : x
  2. Step 2: Convert to fraction form
    28,436.43/39,242.19 = 15,690.42/x
  3. Step 3: Cross multiply
    28,436.43x = 39,242.19 × 15,690.42
  4. Step 4: Simplify right side
    28,436.43x = 615,726,442.82
  5. Step 5: Solve for x
    x = 615,726,442.82/28,436.43
  6. Step 6: Final answer
    x = 21,652.73

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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.