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Finding the Fourth Proportional to 12,672.60, 19,008.90 and 5,760.60

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Solution

The fourth proportional to 12,672.60, 19,008.90 and 5,760.60 is: 8,640.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,672.60 : 19,008.90 = 5,760.60 : x
  2. Step 2: Convert to fraction form
    12,672.60/19,008.90 = 5,760.60/x
  3. Step 3: Cross multiply
    12,672.60x = 19,008.90 × 5,760.60
  4. Step 4: Simplify right side
    12,672.60x = 109,502,669.34
  5. Step 5: Solve for x
    x = 109,502,669.34/12,672.60
  6. Step 6: Final answer
    x = 8,640.90

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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.