Home / 12,079.74-16,686.90-11,449.20

Finding the Fourth Proportional to 12,079.74, 16,686.90 and 11,449.20

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Solution

The fourth proportional to 12,079.74, 16,686.90 and 11,449.20 is: 15,815.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,079.74 : 16,686.90 = 11,449.20 : x
  2. Step 2: Convert to fraction form
    12,079.74/16,686.90 = 11,449.20/x
  3. Step 3: Cross multiply
    12,079.74x = 16,686.90 × 11,449.20
  4. Step 4: Simplify right side
    12,079.74x = 191,051,655.48
  5. Step 5: Solve for x
    x = 191,051,655.48/12,079.74
  6. Step 6: Final answer
    x = 15,815.87

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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.