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Finding the Fourth Proportional to 13,931.64, 20,892.20 and 5,608.82

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Solution

The fourth proportional to 13,931.64, 20,892.20 and 5,608.82 is: 8,411.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,931.64 : 20,892.20 = 5,608.82 : x
  2. Step 2: Convert to fraction form
    13,931.64/20,892.20 = 5,608.82/x
  3. Step 3: Cross multiply
    13,931.64x = 20,892.20 × 5,608.82
  4. Step 4: Simplify right side
    13,931.64x = 117,180,589.20
  5. Step 5: Solve for x
    x = 117,180,589.20/13,931.64
  6. Step 6: Final answer
    x = 8,411.11

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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.