Home / 13,122.57-18,109.11-7,154.24

Finding the Fourth Proportional to 13,122.57, 18,109.11 and 7,154.24

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Solution

The fourth proportional to 13,122.57, 18,109.11 and 7,154.24 is: 9,872.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,122.57 : 18,109.11 = 7,154.24 : x
  2. Step 2: Convert to fraction form
    13,122.57/18,109.11 = 7,154.24/x
  3. Step 3: Cross multiply
    13,122.57x = 18,109.11 × 7,154.24
  4. Step 4: Simplify right side
    13,122.57x = 129,556,828.58
  5. Step 5: Solve for x
    x = 129,556,828.58/13,122.57
  6. Step 6: Final answer
    x = 9,872.82

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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.