Home / 12,421.40-18,632.07-3,187.40

Finding the Fourth Proportional to 12,421.40, 18,632.07 and 3,187.40

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Solution

The fourth proportional to 12,421.40, 18,632.07 and 3,187.40 is: 4,781.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.40 : 18,632.07 = 3,187.40 : x
  2. Step 2: Convert to fraction form
    12,421.40/18,632.07 = 3,187.40/x
  3. Step 3: Cross multiply
    12,421.40x = 18,632.07 × 3,187.40
  4. Step 4: Simplify right side
    12,421.40x = 59,387,859.92
  5. Step 5: Solve for x
    x = 59,387,859.92/12,421.40
  6. Step 6: Final answer
    x = 4,781.09

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Similar ratio
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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.