Home / 13,279.20-18,219.84-13,155.36

Finding the Fourth Proportional to 13,279.20, 18,219.84 and 13,155.36

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Solution

The fourth proportional to 13,279.20, 18,219.84 and 13,155.36 is: 18,049.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.20 : 18,219.84 = 13,155.36 : x
  2. Step 2: Convert to fraction form
    13,279.20/18,219.84 = 13,155.36/x
  3. Step 3: Cross multiply
    13,279.20x = 18,219.84 × 13,155.36
  4. Step 4: Simplify right side
    13,279.20x = 239,688,554.34
  5. Step 5: Solve for x
    x = 239,688,554.34/13,279.20
  6. Step 6: Final answer
    x = 18,049.92

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.