Home / 13,123.20-19,694.40-8,739.20

Finding the Fourth Proportional to 13,123.20, 19,694.40 and 8,739.20

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Solution

The fourth proportional to 13,123.20, 19,694.40 and 8,739.20 is: 13,115.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,123.20 : 19,694.40 = 8,739.20 : x
  2. Step 2: Convert to fraction form
    13,123.20/19,694.40 = 8,739.20/x
  3. Step 3: Cross multiply
    13,123.20x = 19,694.40 × 8,739.20
  4. Step 4: Simplify right side
    13,123.20x = 172,113,300.48
  5. Step 5: Solve for x
    x = 172,113,300.48/13,123.20
  6. Step 6: Final answer
    x = 13,115.19

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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.