Home / 28,425.98-39,227.35-15,680.32

Finding the Fourth Proportional to 28,425.98, 39,227.35 and 15,680.32

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Solution

The fourth proportional to 28,425.98, 39,227.35 and 15,680.32 is: 21,638.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,425.98 : 39,227.35 = 15,680.32 : x
  2. Step 2: Convert to fraction form
    28,425.98/39,227.35 = 15,680.32/x
  3. Step 3: Cross multiply
    28,425.98x = 39,227.35 × 15,680.32
  4. Step 4: Simplify right side
    28,425.98x = 615,097,400.75
  5. Step 5: Solve for x
    x = 615,097,400.75/28,425.98
  6. Step 6: Final answer
    x = 21,638.56

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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.