Home / 12,908.38-19,360.24-3,420.76

Finding the Fourth Proportional to 12,908.38, 19,360.24 and 3,420.76

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Solution

The fourth proportional to 12,908.38, 19,360.24 and 3,420.76 is: 5,130.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,908.38 : 19,360.24 = 3,420.76 : x
  2. Step 2: Convert to fraction form
    12,908.38/19,360.24 = 3,420.76/x
  3. Step 3: Cross multiply
    12,908.38x = 19,360.24 × 3,420.76
  4. Step 4: Simplify right side
    12,908.38x = 66,226,734.58
  5. Step 5: Solve for x
    x = 66,226,734.58/12,908.38
  6. Step 6: Final answer
    x = 5,130.52

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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.