Home / 15,133.28-20,882.72-8,418.80

Finding the Fourth Proportional to 15,133.28, 20,882.72 and 8,418.80

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Solution

The fourth proportional to 15,133.28, 20,882.72 and 8,418.80 is: 11,617.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,133.28 : 20,882.72 = 8,418.80 : x
  2. Step 2: Convert to fraction form
    15,133.28/20,882.72 = 8,418.80/x
  3. Step 3: Cross multiply
    15,133.28x = 20,882.72 × 8,418.80
  4. Step 4: Simplify right side
    15,133.28x = 175,807,443.14
  5. Step 5: Solve for x
    x = 175,807,443.14/15,133.28
  6. Step 6: Final answer
    x = 11,617.27

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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.