Home / 12,209.22-18,315.18-4,818.78

Finding the Fourth Proportional to 12,209.22, 18,315.18 and 4,818.78

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Solution

The fourth proportional to 12,209.22, 18,315.18 and 4,818.78 is: 7,228.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,209.22 : 18,315.18 = 4,818.78 : x
  2. Step 2: Convert to fraction form
    12,209.22/18,315.18 = 4,818.78/x
  3. Step 3: Cross multiply
    12,209.22x = 18,315.18 × 4,818.78
  4. Step 4: Simplify right side
    12,209.22x = 88,256,823.08
  5. Step 5: Solve for x
    x = 88,256,823.08/12,209.22
  6. Step 6: Final answer
    x = 7,228.70

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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.