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Finding the Fourth Proportional to 12,359.66, 18,531.28 and 6,815.66

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Solution

The fourth proportional to 12,359.66, 18,531.28 and 6,815.66 is: 10,218.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,359.66 : 18,531.28 = 6,815.66 : x
  2. Step 2: Convert to fraction form
    12,359.66/18,531.28 = 6,815.66/x
  3. Step 3: Cross multiply
    12,359.66x = 18,531.28 × 6,815.66
  4. Step 4: Simplify right side
    12,359.66x = 126,302,903.84
  5. Step 5: Solve for x
    x = 126,302,903.84/12,359.66
  6. Step 6: Final answer
    x = 10,218.96

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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.