Home / 8,991.28-12,404.40-5,453.20

Finding the Fourth Proportional to 8,991.28, 12,404.40 and 5,453.20

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Solution

The fourth proportional to 8,991.28, 12,404.40 and 5,453.20 is: 7,523.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.28 : 12,404.40 = 5,453.20 : x
  2. Step 2: Convert to fraction form
    8,991.28/12,404.40 = 5,453.20/x
  3. Step 3: Cross multiply
    8,991.28x = 12,404.40 × 5,453.20
  4. Step 4: Simplify right side
    8,991.28x = 67,643,674.08
  5. Step 5: Solve for x
    x = 67,643,674.08/8,991.28
  6. Step 6: Final answer
    x = 7,523.25

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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.