Home / 11,389.14-15,724.77-8,731.86

Finding the Fourth Proportional to 11,389.14, 15,724.77 and 8,731.86

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Solution

The fourth proportional to 11,389.14, 15,724.77 and 8,731.86 is: 12,055.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,389.14 : 15,724.77 = 8,731.86 : x
  2. Step 2: Convert to fraction form
    11,389.14/15,724.77 = 8,731.86/x
  3. Step 3: Cross multiply
    11,389.14x = 15,724.77 × 8,731.86
  4. Step 4: Simplify right side
    11,389.14x = 137,306,490.17
  5. Step 5: Solve for x
    x = 137,306,490.17/11,389.14
  6. Step 6: Final answer
    x = 12,055.91

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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.