Home / 10,917.12-16,382.80-5,990.20

Finding the Fourth Proportional to 10,917.12, 16,382.80 and 5,990.20

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Solution

The fourth proportional to 10,917.12, 16,382.80 and 5,990.20 is: 8,989.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,917.12 : 16,382.80 = 5,990.20 : x
  2. Step 2: Convert to fraction form
    10,917.12/16,382.80 = 5,990.20/x
  3. Step 3: Cross multiply
    10,917.12x = 16,382.80 × 5,990.20
  4. Step 4: Simplify right side
    10,917.12x = 98,136,248.56
  5. Step 5: Solve for x
    x = 98,136,248.56/10,917.12
  6. Step 6: Final answer
    x = 8,989.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.