Home / 28,427.63-39,229.31-15,680.86

Finding the Fourth Proportional to 28,427.63, 39,229.31 and 15,680.86

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Solution

The fourth proportional to 28,427.63, 39,229.31 and 15,680.86 is: 21,639.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,427.63 : 39,229.31 = 15,680.86 : x
  2. Step 2: Convert to fraction form
    28,427.63/39,229.31 = 15,680.86/x
  3. Step 3: Cross multiply
    28,427.63x = 39,229.31 × 15,680.86
  4. Step 4: Simplify right side
    28,427.63x = 615,149,259.14
  5. Step 5: Solve for x
    x = 615,149,259.14/28,427.63
  6. Step 6: Final answer
    x = 21,639.14

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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.