Home / 9,180.50-12,669.12-4,988.78

Finding the Fourth Proportional to 9,180.50, 12,669.12 and 4,988.78

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Solution

The fourth proportional to 9,180.50, 12,669.12 and 4,988.78 is: 6,884.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,180.50 : 12,669.12 = 4,988.78 : x
  2. Step 2: Convert to fraction form
    9,180.50/12,669.12 = 4,988.78/x
  3. Step 3: Cross multiply
    9,180.50x = 12,669.12 × 4,988.78
  4. Step 4: Simplify right side
    9,180.50x = 63,203,452.47
  5. Step 5: Solve for x
    x = 63,203,452.47/9,180.50
  6. Step 6: Final answer
    x = 6,884.53

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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.