Home / 13,151.46-18,148.49-7,408.78

Finding the Fourth Proportional to 13,151.46, 18,148.49 and 7,408.78

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Solution

The fourth proportional to 13,151.46, 18,148.49 and 7,408.78 is: 10,223.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,151.46 : 18,148.49 = 7,408.78 : x
  2. Step 2: Convert to fraction form
    13,151.46/18,148.49 = 7,408.78/x
  3. Step 3: Cross multiply
    13,151.46x = 18,148.49 × 7,408.78
  4. Step 4: Simplify right side
    13,151.46x = 134,458,169.74
  5. Step 5: Solve for x
    x = 134,458,169.74/13,151.46
  6. Step 6: Final answer
    x = 10,223.82

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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.