Home / 11,139.13-15,378.99-7,167.15

Finding the Fourth Proportional to 11,139.13, 15,378.99 and 7,167.15

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Solution

The fourth proportional to 11,139.13, 15,378.99 and 7,167.15 is: 9,895.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139.13 : 15,378.99 = 7,167.15 : x
  2. Step 2: Convert to fraction form
    11,139.13/15,378.99 = 7,167.15/x
  3. Step 3: Cross multiply
    11,139.13x = 15,378.99 × 7,167.15
  4. Step 4: Simplify right side
    11,139.13x = 110,223,528.18
  5. Step 5: Solve for x
    x = 110,223,528.18/11,139.13
  6. Step 6: Final answer
    x = 9,895.16

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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.