Home / 11,139.12-15,370.97-6,422.49

Finding the Fourth Proportional to 11,139.12, 15,370.97 and 6,422.49

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Solution

The fourth proportional to 11,139.12, 15,370.97 and 6,422.49 is: 8,862.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139.12 : 15,370.97 = 6,422.49 : x
  2. Step 2: Convert to fraction form
    11,139.12/15,370.97 = 6,422.49/x
  3. Step 3: Cross multiply
    11,139.12x = 15,370.97 × 6,422.49
  4. Step 4: Simplify right side
    11,139.12x = 98,719,869.00
  5. Step 5: Solve for x
    x = 98,719,869.00/11,139.12
  6. Step 6: Final answer
    x = 8,862.45

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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.