Home / 15,061.38-20,786.95-8,686.79

Finding the Fourth Proportional to 15,061.38, 20,786.95 and 8,686.79

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Solution

The fourth proportional to 15,061.38, 20,786.95 and 8,686.79 is: 11,989.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,061.38 : 20,786.95 = 8,686.79 : x
  2. Step 2: Convert to fraction form
    15,061.38/20,786.95 = 8,686.79/x
  3. Step 3: Cross multiply
    15,061.38x = 20,786.95 × 8,686.79
  4. Step 4: Simplify right side
    15,061.38x = 180,571,776.31
  5. Step 5: Solve for x
    x = 180,571,776.31/15,061.38
  6. Step 6: Final answer
    x = 11,989.06

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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.