Home / 12,649.12-18,974.16-3,415.36

Finding the Fourth Proportional to 12,649.12, 18,974.16 and 3,415.36

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Solution

The fourth proportional to 12,649.12, 18,974.16 and 3,415.36 is: 5,123.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,649.12 : 18,974.16 = 3,415.36 : x
  2. Step 2: Convert to fraction form
    12,649.12/18,974.16 = 3,415.36/x
  3. Step 3: Cross multiply
    12,649.12x = 18,974.16 × 3,415.36
  4. Step 4: Simplify right side
    12,649.12x = 64,803,587.10
  5. Step 5: Solve for x
    x = 64,803,587.10/12,649.12
  6. Step 6: Final answer
    x = 5,123.17

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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.