Home / 13,402.05-18,491.76-8,928.21

Finding the Fourth Proportional to 13,402.05, 18,491.76 and 8,928.21

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Solution

The fourth proportional to 13,402.05, 18,491.76 and 8,928.21 is: 12,318.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,402.05 : 18,491.76 = 8,928.21 : x
  2. Step 2: Convert to fraction form
    13,402.05/18,491.76 = 8,928.21/x
  3. Step 3: Cross multiply
    13,402.05x = 18,491.76 × 8,928.21
  4. Step 4: Simplify right side
    13,402.05x = 165,098,316.55
  5. Step 5: Solve for x
    x = 165,098,316.55/13,402.05
  6. Step 6: Final answer
    x = 12,318.89

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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.