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Finding the Fourth Proportional to 12,387.56, 18,569.94 and 5,363.16

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Solution

The fourth proportional to 12,387.56, 18,569.94 and 5,363.16 is: 8,039.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.56 : 18,569.94 = 5,363.16 : x
  2. Step 2: Convert to fraction form
    12,387.56/18,569.94 = 5,363.16/x
  3. Step 3: Cross multiply
    12,387.56x = 18,569.94 × 5,363.16
  4. Step 4: Simplify right side
    12,387.56x = 99,593,559.41
  5. Step 5: Solve for x
    x = 99,593,559.41/12,387.56
  6. Step 6: Final answer
    x = 8,039.81

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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.