Home / 12,234.40-18,355.65-3,915.70

Finding the Fourth Proportional to 12,234.40, 18,355.65 and 3,915.70

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Solution

The fourth proportional to 12,234.40, 18,355.65 and 3,915.70 is: 5,874.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,234.40 : 18,355.65 = 3,915.70 : x
  2. Step 2: Convert to fraction form
    12,234.40/18,355.65 = 3,915.70/x
  3. Step 3: Cross multiply
    12,234.40x = 18,355.65 × 3,915.70
  4. Step 4: Simplify right side
    12,234.40x = 71,875,218.71
  5. Step 5: Solve for x
    x = 71,875,218.71/12,234.40
  6. Step 6: Final answer
    x = 5,874.85

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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.