Home / 9,139.80-12,612.82-5,161.08

Finding the Fourth Proportional to 9,139.80, 12,612.82 and 5,161.08

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Solution

The fourth proportional to 9,139.80, 12,612.82 and 5,161.08 is: 7,122.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,139.80 : 12,612.82 = 5,161.08 : x
  2. Step 2: Convert to fraction form
    9,139.80/12,612.82 = 5,161.08/x
  3. Step 3: Cross multiply
    9,139.80x = 12,612.82 × 5,161.08
  4. Step 4: Simplify right side
    9,139.80x = 65,095,773.05
  5. Step 5: Solve for x
    x = 65,095,773.05/9,139.80
  6. Step 6: Final answer
    x = 7,122.23

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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.