Home / 13,487.64-18,591.30-8,172.42

Finding the Fourth Proportional to 13,487.64, 18,591.30 and 8,172.42

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Solution

The fourth proportional to 13,487.64, 18,591.30 and 8,172.42 is: 11,264.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,487.64 : 18,591.30 = 8,172.42 : x
  2. Step 2: Convert to fraction form
    13,487.64/18,591.30 = 8,172.42/x
  3. Step 3: Cross multiply
    13,487.64x = 18,591.30 × 8,172.42
  4. Step 4: Simplify right side
    13,487.64x = 151,935,911.95
  5. Step 5: Solve for x
    x = 151,935,911.95/13,487.64
  6. Step 6: Final answer
    x = 11,264.83

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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.