Home / 15,020.48-20,728.40-8,305.76

Finding the Fourth Proportional to 15,020.48, 20,728.40 and 8,305.76

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Solution

The fourth proportional to 15,020.48, 20,728.40 and 8,305.76 is: 11,462.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,020.48 : 20,728.40 = 8,305.76 : x
  2. Step 2: Convert to fraction form
    15,020.48/20,728.40 = 8,305.76/x
  3. Step 3: Cross multiply
    15,020.48x = 20,728.40 × 8,305.76
  4. Step 4: Simplify right side
    15,020.48x = 172,165,115.58
  5. Step 5: Solve for x
    x = 172,165,115.58/15,020.48
  6. Step 6: Final answer
    x = 11,462.02

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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.