Home / 13,126.40-18,114.86-7,158.39

Finding the Fourth Proportional to 13,126.40, 18,114.86 and 7,158.39

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Solution

The fourth proportional to 13,126.40, 18,114.86 and 7,158.39 is: 9,878.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.40 : 18,114.86 = 7,158.39 : x
  2. Step 2: Convert to fraction form
    13,126.40/18,114.86 = 7,158.39/x
  3. Step 3: Cross multiply
    13,126.40x = 18,114.86 × 7,158.39
  4. Step 4: Simplify right side
    13,126.40x = 129,673,250.57
  5. Step 5: Solve for x
    x = 129,673,250.57/13,126.40
  6. Step 6: Final answer
    x = 9,878.82

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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.