Home / 13,298.78-18,343.61-8,191.68

Finding the Fourth Proportional to 13,298.78, 18,343.61 and 8,191.68

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Solution

The fourth proportional to 13,298.78, 18,343.61 and 8,191.68 is: 11,299.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,298.78 : 18,343.61 = 8,191.68 : x
  2. Step 2: Convert to fraction form
    13,298.78/18,343.61 = 8,191.68/x
  3. Step 3: Cross multiply
    13,298.78x = 18,343.61 × 8,191.68
  4. Step 4: Simplify right side
    13,298.78x = 150,265,053.40
  5. Step 5: Solve for x
    x = 150,265,053.40/13,298.78
  6. Step 6: Final answer
    x = 11,299.16

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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.