Home / 11,132.40-16,666.20-7,438.80

Finding the Fourth Proportional to 11,132.40, 16,666.20 and 7,438.80

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Solution

The fourth proportional to 11,132.40, 16,666.20 and 7,438.80 is: 11,136.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,132.40 : 16,666.20 = 7,438.80 : x
  2. Step 2: Convert to fraction form
    11,132.40/16,666.20 = 7,438.80/x
  3. Step 3: Cross multiply
    11,132.40x = 16,666.20 × 7,438.80
  4. Step 4: Simplify right side
    11,132.40x = 123,976,528.56
  5. Step 5: Solve for x
    x = 123,976,528.56/11,132.40
  6. Step 6: Final answer
    x = 11,136.55

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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.