Home / 13,122.57-18,109.26-7,154.40

Finding the Fourth Proportional to 13,122.57, 18,109.26 and 7,154.40

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Solution

The fourth proportional to 13,122.57, 18,109.26 and 7,154.40 is: 9,873.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,122.57 : 18,109.26 = 7,154.40 : x
  2. Step 2: Convert to fraction form
    13,122.57/18,109.26 = 7,154.40/x
  3. Step 3: Cross multiply
    13,122.57x = 18,109.26 × 7,154.40
  4. Step 4: Simplify right side
    13,122.57x = 129,560,889.74
  5. Step 5: Solve for x
    x = 129,560,889.74/13,122.57
  6. Step 6: Final answer
    x = 9,873.13

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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.