Home / 15,402.30-21,255.24-8,328.78

Finding the Fourth Proportional to 15,402.30, 21,255.24 and 8,328.78

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Solution

The fourth proportional to 15,402.30, 21,255.24 and 8,328.78 is: 11,493.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,402.30 : 21,255.24 = 8,328.78 : x
  2. Step 2: Convert to fraction form
    15,402.30/21,255.24 = 8,328.78/x
  3. Step 3: Cross multiply
    15,402.30x = 21,255.24 × 8,328.78
  4. Step 4: Simplify right side
    15,402.30x = 177,030,217.81
  5. Step 5: Solve for x
    x = 177,030,217.81/15,402.30
  6. Step 6: Final answer
    x = 11,493.75

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