Home / 8,938.80-12,339.27-5,401.13

Finding the Fourth Proportional to 8,938.80, 12,339.27 and 5,401.13

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Solution

The fourth proportional to 8,938.80, 12,339.27 and 5,401.13 is: 7,455.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,938.80 : 12,339.27 = 5,401.13 : x
  2. Step 2: Convert to fraction form
    8,938.80/12,339.27 = 5,401.13/x
  3. Step 3: Cross multiply
    8,938.80x = 12,339.27 × 5,401.13
  4. Step 4: Simplify right side
    8,938.80x = 66,645,939.68
  5. Step 5: Solve for x
    x = 66,645,939.68/8,938.80
  6. Step 6: Final answer
    x = 7,455.80

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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.