Home / 12,720.06-17,559.45-8,189.28

Finding the Fourth Proportional to 12,720.06, 17,559.45 and 8,189.28

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Solution

The fourth proportional to 12,720.06, 17,559.45 and 8,189.28 is: 11,304.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.06 : 17,559.45 = 8,189.28 : x
  2. Step 2: Convert to fraction form
    12,720.06/17,559.45 = 8,189.28/x
  3. Step 3: Cross multiply
    12,720.06x = 17,559.45 × 8,189.28
  4. Step 4: Simplify right side
    12,720.06x = 143,799,252.70
  5. Step 5: Solve for x
    x = 143,799,252.70/12,720.06
  6. Step 6: Final answer
    x = 11,304.92

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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.