Home / 11,257.80-16,862.40-7,321.20

Finding the Fourth Proportional to 11,257.80, 16,862.40 and 7,321.20

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Solution

The fourth proportional to 11,257.80, 16,862.40 and 7,321.20 is: 10,966.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,257.80 : 16,862.40 = 7,321.20 : x
  2. Step 2: Convert to fraction form
    11,257.80/16,862.40 = 7,321.20/x
  3. Step 3: Cross multiply
    11,257.80x = 16,862.40 × 7,321.20
  4. Step 4: Simplify right side
    11,257.80x = 123,453,002.88
  5. Step 5: Solve for x
    x = 123,453,002.88/11,257.80
  6. Step 6: Final answer
    x = 10,966.00

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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.