Home / 15,021.29-20,728.55-8,306.47

Finding the Fourth Proportional to 15,021.29, 20,728.55 and 8,306.47

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Solution

The fourth proportional to 15,021.29, 20,728.55 and 8,306.47 is: 11,462.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,021.29 : 20,728.55 = 8,306.47 : x
  2. Step 2: Convert to fraction form
    15,021.29/20,728.55 = 8,306.47/x
  3. Step 3: Cross multiply
    15,021.29x = 20,728.55 × 8,306.47
  4. Step 4: Simplify right side
    15,021.29x = 172,181,078.72
  5. Step 5: Solve for x
    x = 172,181,078.72/15,021.29
  6. Step 6: Final answer
    x = 11,462.47

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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.