Home / 15,453.18-21,325.28-8,379.55

Finding the Fourth Proportional to 15,453.18, 21,325.28 and 8,379.55

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Solution

The fourth proportional to 15,453.18, 21,325.28 and 8,379.55 is: 11,563.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,453.18 : 21,325.28 = 8,379.55 : x
  2. Step 2: Convert to fraction form
    15,453.18/21,325.28 = 8,379.55/x
  3. Step 3: Cross multiply
    15,453.18x = 21,325.28 × 8,379.55
  4. Step 4: Simplify right side
    15,453.18x = 178,696,234.78
  5. Step 5: Solve for x
    x = 178,696,234.78/15,453.18
  6. Step 6: Final answer
    x = 11,563.72

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1.5x scale

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.