Home / 13,131.98-18,115.11-8,877.45

Finding the Fourth Proportional to 13,131.98, 18,115.11 and 8,877.45

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Solution

The fourth proportional to 13,131.98, 18,115.11 and 8,877.45 is: 12,246.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.98 : 18,115.11 = 8,877.45 : x
  2. Step 2: Convert to fraction form
    13,131.98/18,115.11 = 8,877.45/x
  3. Step 3: Cross multiply
    13,131.98x = 18,115.11 × 8,877.45
  4. Step 4: Simplify right side
    13,131.98x = 160,815,983.27
  5. Step 5: Solve for x
    x = 160,815,983.27/13,131.98
  6. Step 6: Final answer
    x = 12,246.14

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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.