Home / 13,398.08-18,489.36-7,429.79

Finding the Fourth Proportional to 13,398.08, 18,489.36 and 7,429.79

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Solution

The fourth proportional to 13,398.08, 18,489.36 and 7,429.79 is: 10,253.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,398.08 : 18,489.36 = 7,429.79 : x
  2. Step 2: Convert to fraction form
    13,398.08/18,489.36 = 7,429.79/x
  3. Step 3: Cross multiply
    13,398.08x = 18,489.36 × 7,429.79
  4. Step 4: Simplify right side
    13,398.08x = 137,371,969.59
  5. Step 5: Solve for x
    x = 137,371,969.59/13,398.08
  6. Step 6: Final answer
    x = 10,253.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.