Home / 13,564.16-20,359.20-8,380.16

Finding the Fourth Proportional to 13,564.16, 20,359.20 and 8,380.16

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Solution

The fourth proportional to 13,564.16, 20,359.20 and 8,380.16 is: 12,578.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,564.16 : 20,359.20 = 8,380.16 : x
  2. Step 2: Convert to fraction form
    13,564.16/20,359.20 = 8,380.16/x
  3. Step 3: Cross multiply
    13,564.16x = 20,359.20 × 8,380.16
  4. Step 4: Simplify right side
    13,564.16x = 170,613,353.47
  5. Step 5: Solve for x
    x = 170,613,353.47/13,564.16
  6. Step 6: Final answer
    x = 12,578.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.