Home / 13,287.71-19,916.69-5,388.39

Finding the Fourth Proportional to 13,287.71, 19,916.69 and 5,388.39

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Solution

The fourth proportional to 13,287.71, 19,916.69 and 5,388.39 is: 8,076.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,287.71 : 19,916.69 = 5,388.39 : x
  2. Step 2: Convert to fraction form
    13,287.71/19,916.69 = 5,388.39/x
  3. Step 3: Cross multiply
    13,287.71x = 19,916.69 × 5,388.39
  4. Step 4: Simplify right side
    13,287.71x = 107,318,866.29
  5. Step 5: Solve for x
    x = 107,318,866.29/13,287.71
  6. Step 6: Final answer
    x = 8,076.55

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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.