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Finding the Fourth Proportional to 12,666.40, 18,999.60 and 12,301.90

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Solution

The fourth proportional to 12,666.40, 18,999.60 and 12,301.90 is: 18,452.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,666.40 : 18,999.60 = 12,301.90 : x
  2. Step 2: Convert to fraction form
    12,666.40/18,999.60 = 12,301.90/x
  3. Step 3: Cross multiply
    12,666.40x = 18,999.60 × 12,301.90
  4. Step 4: Simplify right side
    12,666.40x = 233,731,179.24
  5. Step 5: Solve for x
    x = 233,731,179.24/12,666.40
  6. Step 6: Final answer
    x = 18,452.85

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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.