Home / 12,711.20-17,541.84-7,122.08

Finding the Fourth Proportional to 12,711.20, 17,541.84 and 7,122.08

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Solution

The fourth proportional to 12,711.20, 17,541.84 and 7,122.08 is: 9,828.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,711.20 : 17,541.84 = 7,122.08 : x
  2. Step 2: Convert to fraction form
    12,711.20/17,541.84 = 7,122.08/x
  3. Step 3: Cross multiply
    12,711.20x = 17,541.84 × 7,122.08
  4. Step 4: Simplify right side
    12,711.20x = 124,934,387.83
  5. Step 5: Solve for x
    x = 124,934,387.83/12,711.20
  6. Step 6: Final answer
    x = 9,828.69

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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.