Home / 12,685.48-19,029.18-3,921.28

Finding the Fourth Proportional to 12,685.48, 19,029.18 and 3,921.28

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Solution

The fourth proportional to 12,685.48, 19,029.18 and 3,921.28 is: 5,882.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,685.48 : 19,029.18 = 3,921.28 : x
  2. Step 2: Convert to fraction form
    12,685.48/19,029.18 = 3,921.28/x
  3. Step 3: Cross multiply
    12,685.48x = 19,029.18 × 3,921.28
  4. Step 4: Simplify right side
    12,685.48x = 74,618,742.95
  5. Step 5: Solve for x
    x = 74,618,742.95/12,685.48
  6. Step 6: Final answer
    x = 5,882.22

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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.