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Finding the Fourth Proportional to 12,479.16, 18,731.43 and 6,243.69

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Solution

The fourth proportional to 12,479.16, 18,731.43 and 6,243.69 is: 9,371.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.16 : 18,731.43 = 6,243.69 : x
  2. Step 2: Convert to fraction form
    12,479.16/18,731.43 = 6,243.69/x
  3. Step 3: Cross multiply
    12,479.16x = 18,731.43 × 6,243.69
  4. Step 4: Simplify right side
    12,479.16x = 116,953,242.18
  5. Step 5: Solve for x
    x = 116,953,242.18/12,479.16
  6. Step 6: Final answer
    x = 9,371.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.