Home / 12,920.38-19,377.02-3,558.20

Finding the Fourth Proportional to 12,920.38, 19,377.02 and 3,558.20

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Solution

The fourth proportional to 12,920.38, 19,377.02 and 3,558.20 is: 5,336.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,920.38 : 19,377.02 = 3,558.20 : x
  2. Step 2: Convert to fraction form
    12,920.38/19,377.02 = 3,558.20/x
  3. Step 3: Cross multiply
    12,920.38x = 19,377.02 × 3,558.20
  4. Step 4: Simplify right side
    12,920.38x = 68,947,312.56
  5. Step 5: Solve for x
    x = 68,947,312.56/12,920.38
  6. Step 6: Final answer
    x = 5,336.32

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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.