Home / 11,478.85-15,839.75-6,443.28

Finding the Fourth Proportional to 11,478.85, 15,839.75 and 6,443.28

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Solution

The fourth proportional to 11,478.85, 15,839.75 and 6,443.28 is: 8,891.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,478.85 : 15,839.75 = 6,443.28 : x
  2. Step 2: Convert to fraction form
    11,478.85/15,839.75 = 6,443.28/x
  3. Step 3: Cross multiply
    11,478.85x = 15,839.75 × 6,443.28
  4. Step 4: Simplify right side
    11,478.85x = 102,059,960.49
  5. Step 5: Solve for x
    x = 102,059,960.49/11,478.85
  6. Step 6: Final answer
    x = 8,891.13

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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.