Home / 12,421.74-17,145.20-8,645.52

Finding the Fourth Proportional to 12,421.74, 17,145.20 and 8,645.52

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Solution

The fourth proportional to 12,421.74, 17,145.20 and 8,645.52 is: 11,933.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.74 : 17,145.20 = 8,645.52 : x
  2. Step 2: Convert to fraction form
    12,421.74/17,145.20 = 8,645.52/x
  3. Step 3: Cross multiply
    12,421.74x = 17,145.20 × 8,645.52
  4. Step 4: Simplify right side
    12,421.74x = 148,229,169.50
  5. Step 5: Solve for x
    x = 148,229,169.50/12,421.74
  6. Step 6: Final answer
    x = 11,933.04

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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.