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Finding the Fourth Proportional to 12,266.70, 18,400.05 and 7,871.10

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Solution

The fourth proportional to 12,266.70, 18,400.05 and 7,871.10 is: 11,806.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,266.70 : 18,400.05 = 7,871.10 : x
  2. Step 2: Convert to fraction form
    12,266.70/18,400.05 = 7,871.10/x
  3. Step 3: Cross multiply
    12,266.70x = 18,400.05 × 7,871.10
  4. Step 4: Simplify right side
    12,266.70x = 144,828,633.56
  5. Step 5: Solve for x
    x = 144,828,633.56/12,266.70
  6. Step 6: Final answer
    x = 11,806.65

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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.