Home / 12,348.20-18,479.10-11,311.40

Finding the Fourth Proportional to 12,348.20, 18,479.10 and 11,311.40

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Solution

The fourth proportional to 12,348.20, 18,479.10 and 11,311.40 is: 16,927.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,348.20 : 18,479.10 = 11,311.40 : x
  2. Step 2: Convert to fraction form
    12,348.20/18,479.10 = 11,311.40/x
  3. Step 3: Cross multiply
    12,348.20x = 18,479.10 × 11,311.40
  4. Step 4: Simplify right side
    12,348.20x = 209,024,491.74
  5. Step 5: Solve for x
    x = 209,024,491.74/12,348.20
  6. Step 6: Final answer
    x = 16,927.53

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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.