Home / 15,019.89-20,728.76-8,306.61

Finding the Fourth Proportional to 15,019.89, 20,728.76 and 8,306.61

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Solution

The fourth proportional to 15,019.89, 20,728.76 and 8,306.61 is: 11,463.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,019.89 : 20,728.76 = 8,306.61 : x
  2. Step 2: Convert to fraction form
    15,019.89/20,728.76 = 8,306.61/x
  3. Step 3: Cross multiply
    15,019.89x = 20,728.76 × 8,306.61
  4. Step 4: Simplify right side
    15,019.89x = 172,185,683.57
  5. Step 5: Solve for x
    x = 172,185,683.57/15,019.89
  6. Step 6: Final answer
    x = 11,463.84

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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.