Home / 13,291.29-19,936.95-12,479.36

Finding the Fourth Proportional to 13,291.29, 19,936.95 and 12,479.36

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Solution

The fourth proportional to 13,291.29, 19,936.95 and 12,479.36 is: 18,719.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,291.29 : 19,936.95 = 12,479.36 : x
  2. Step 2: Convert to fraction form
    13,291.29/19,936.95 = 12,479.36/x
  3. Step 3: Cross multiply
    13,291.29x = 19,936.95 × 12,479.36
  4. Step 4: Simplify right side
    13,291.29x = 248,800,376.35
  5. Step 5: Solve for x
    x = 248,800,376.35/13,291.29
  6. Step 6: Final answer
    x = 18,719.06

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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.