Home / 11,144.87-15,382.20-6,428.51

Finding the Fourth Proportional to 11,144.87, 15,382.20 and 6,428.51

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Solution

The fourth proportional to 11,144.87, 15,382.20 and 6,428.51 is: 8,872.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,144.87 : 15,382.20 = 6,428.51 : x
  2. Step 2: Convert to fraction form
    11,144.87/15,382.20 = 6,428.51/x
  3. Step 3: Cross multiply
    11,144.87x = 15,382.20 × 6,428.51
  4. Step 4: Simplify right side
    11,144.87x = 98,884,549.61
  5. Step 5: Solve for x
    x = 98,884,549.61/11,144.87
  6. Step 6: Final answer
    x = 8,872.66

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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.