Home / 11,114.79-15,331.19-7,129.59

Finding the Fourth Proportional to 11,114.79, 15,331.19 and 7,129.59

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Solution

The fourth proportional to 11,114.79, 15,331.19 and 7,129.59 is: 9,834.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,114.79 : 15,331.19 = 7,129.59 : x
  2. Step 2: Convert to fraction form
    11,114.79/15,331.19 = 7,129.59/x
  3. Step 3: Cross multiply
    11,114.79x = 15,331.19 × 7,129.59
  4. Step 4: Simplify right side
    11,114.79x = 109,305,063.26
  5. Step 5: Solve for x
    x = 109,305,063.26/11,114.79
  6. Step 6: Final answer
    x = 9,834.20

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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.