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Finding the Fourth Proportional to 12,387.96, 18,570.54 and 5,363.54

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Solution

The fourth proportional to 12,387.96, 18,570.54 and 5,363.54 is: 8,040.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.96 : 18,570.54 = 5,363.54 : x
  2. Step 2: Convert to fraction form
    12,387.96/18,570.54 = 5,363.54/x
  3. Step 3: Cross multiply
    12,387.96x = 18,570.54 × 5,363.54
  4. Step 4: Simplify right side
    12,387.96x = 99,603,834.11
  5. Step 5: Solve for x
    x = 99,603,834.11/12,387.96
  6. Step 6: Final answer
    x = 8,040.37

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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.