Home / 28,454.12-39,266.72-15,878.88

Finding the Fourth Proportional to 28,454.12, 39,266.72 and 15,878.88

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Solution

The fourth proportional to 28,454.12, 39,266.72 and 15,878.88 is: 21,912.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,454.12 : 39,266.72 = 15,878.88 : x
  2. Step 2: Convert to fraction form
    28,454.12/39,266.72 = 15,878.88/x
  3. Step 3: Cross multiply
    28,454.12x = 39,266.72 × 15,878.88
  4. Step 4: Simplify right side
    28,454.12x = 623,511,534.87
  5. Step 5: Solve for x
    x = 623,511,534.87/28,454.12
  6. Step 6: Final answer
    x = 21,912.87

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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.