Home / 12,678.20-17,493.18-7,370.30

Finding the Fourth Proportional to 12,678.20, 17,493.18 and 7,370.30

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Solution

The fourth proportional to 12,678.20, 17,493.18 and 7,370.30 is: 10,169.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,678.20 : 17,493.18 = 7,370.30 : x
  2. Step 2: Convert to fraction form
    12,678.20/17,493.18 = 7,370.30/x
  3. Step 3: Cross multiply
    12,678.20x = 17,493.18 × 7,370.30
  4. Step 4: Simplify right side
    12,678.20x = 128,929,984.55
  5. Step 5: Solve for x
    x = 128,929,984.55/12,678.20
  6. Step 6: Final answer
    x = 10,169.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.