Home / 12,942.80-17,839.55-9,161.11

Finding the Fourth Proportional to 12,942.80, 17,839.55 and 9,161.11

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Solution

The fourth proportional to 12,942.80, 17,839.55 and 9,161.11 is: 12,627.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,942.80 : 17,839.55 = 9,161.11 : x
  2. Step 2: Convert to fraction form
    12,942.80/17,839.55 = 9,161.11/x
  3. Step 3: Cross multiply
    12,942.80x = 17,839.55 × 9,161.11
  4. Step 4: Simplify right side
    12,942.80x = 163,430,079.90
  5. Step 5: Solve for x
    x = 163,430,079.90/12,942.80
  6. Step 6: Final answer
    x = 12,627.10

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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.