Home / 12,489.48-18,713.20-5,818.79

Finding the Fourth Proportional to 12,489.48, 18,713.20 and 5,818.79

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Solution

The fourth proportional to 12,489.48, 18,713.20 and 5,818.79 is: 8,718.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.48 : 18,713.20 = 5,818.79 : x
  2. Step 2: Convert to fraction form
    12,489.48/18,713.20 = 5,818.79/x
  3. Step 3: Cross multiply
    12,489.48x = 18,713.20 × 5,818.79
  4. Step 4: Simplify right side
    12,489.48x = 108,888,135.28
  5. Step 5: Solve for x
    x = 108,888,135.28/12,489.48
  6. Step 6: Final answer
    x = 8,718.39

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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.