Home / 13,158.38-18,153.09-8,619.77

Finding the Fourth Proportional to 13,158.38, 18,153.09 and 8,619.77

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Solution

The fourth proportional to 13,158.38, 18,153.09 and 8,619.77 is: 11,891.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,158.38 : 18,153.09 = 8,619.77 : x
  2. Step 2: Convert to fraction form
    13,158.38/18,153.09 = 8,619.77/x
  3. Step 3: Cross multiply
    13,158.38x = 18,153.09 × 8,619.77
  4. Step 4: Simplify right side
    13,158.38x = 156,475,460.59
  5. Step 5: Solve for x
    x = 156,475,460.59/13,158.38
  6. Step 6: Final answer
    x = 11,891.70

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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.