Home / 13,148.80-19,690.80-8,742.40

Finding the Fourth Proportional to 13,148.80, 19,690.80 and 8,742.40

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Solution

The fourth proportional to 13,148.80, 19,690.80 and 8,742.40 is: 13,092.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,148.80 : 19,690.80 = 8,742.40 : x
  2. Step 2: Convert to fraction form
    13,148.80/19,690.80 = 8,742.40/x
  3. Step 3: Cross multiply
    13,148.80x = 19,690.80 × 8,742.40
  4. Step 4: Simplify right side
    13,148.80x = 172,144,849.92
  5. Step 5: Solve for x
    x = 172,144,849.92/13,148.80
  6. Step 6: Final answer
    x = 13,092.06

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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.