Home / 12,884.16-17,777.28-8,174.40

Finding the Fourth Proportional to 12,884.16, 17,777.28 and 8,174.40

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Solution

The fourth proportional to 12,884.16, 17,777.28 and 8,174.40 is: 11,278.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,884.16 : 17,777.28 = 8,174.40 : x
  2. Step 2: Convert to fraction form
    12,884.16/17,777.28 = 8,174.40/x
  3. Step 3: Cross multiply
    12,884.16x = 17,777.28 × 8,174.40
  4. Step 4: Simplify right side
    12,884.16x = 145,318,597.63
  5. Step 5: Solve for x
    x = 145,318,597.63/12,884.16
  6. Step 6: Final answer
    x = 11,278.86

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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.