Home / 11,178.13-15,410.61-8,440.70

Finding the Fourth Proportional to 11,178.13, 15,410.61 and 8,440.70

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Solution

The fourth proportional to 11,178.13, 15,410.61 and 8,440.70 is: 11,636.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,178.13 : 15,410.61 = 8,440.70 : x
  2. Step 2: Convert to fraction form
    11,178.13/15,410.61 = 8,440.70/x
  3. Step 3: Cross multiply
    11,178.13x = 15,410.61 × 8,440.70
  4. Step 4: Simplify right side
    11,178.13x = 130,076,340.56
  5. Step 5: Solve for x
    x = 130,076,340.56/11,178.13
  6. Step 6: Final answer
    x = 11,636.69

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Half scale
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Double scale
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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.