Home / 15,019.93-20,728.79-8,306.20

Finding the Fourth Proportional to 15,019.93, 20,728.79 and 8,306.20

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Solution

The fourth proportional to 15,019.93, 20,728.79 and 8,306.20 is: 11,463.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,019.93 : 20,728.79 = 8,306.20 : x
  2. Step 2: Convert to fraction form
    15,019.93/20,728.79 = 8,306.20/x
  3. Step 3: Cross multiply
    15,019.93x = 20,728.79 × 8,306.20
  4. Step 4: Simplify right side
    15,019.93x = 172,177,475.50
  5. Step 5: Solve for x
    x = 172,177,475.50/15,019.93
  6. Step 6: Final answer
    x = 11,463.27

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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.