Home / 18,868.61-28,301.28-6,388.36

Finding the Fourth Proportional to 18,868.61, 28,301.28 and 6,388.36

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Solution

The fourth proportional to 18,868.61, 28,301.28 and 6,388.36 is: 9,581.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,868.61 : 28,301.28 = 6,388.36 : x
  2. Step 2: Convert to fraction form
    18,868.61/28,301.28 = 6,388.36/x
  3. Step 3: Cross multiply
    18,868.61x = 28,301.28 × 6,388.36
  4. Step 4: Simplify right side
    18,868.61x = 180,798,765.10
  5. Step 5: Solve for x
    x = 180,798,765.10/18,868.61
  6. Step 6: Final answer
    x = 9,581.99

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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.