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Finding the Fourth Proportional to 12,700.22, 17,559.74 and 11,123.79

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Solution

The fourth proportional to 12,700.22, 17,559.74 and 11,123.79 is: 15,380.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,700.22 : 17,559.74 = 11,123.79 : x
  2. Step 2: Convert to fraction form
    12,700.22/17,559.74 = 11,123.79/x
  3. Step 3: Cross multiply
    12,700.22x = 17,559.74 × 11,123.79
  4. Step 4: Simplify right side
    12,700.22x = 195,330,772.42
  5. Step 5: Solve for x
    x = 195,330,772.42/12,700.22
  6. Step 6: Final answer
    x = 15,380.12

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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.