Home / 15,453.60-21,325.96-8,380

Finding the Fourth Proportional to 15,453.60, 21,325.96 and 8,380

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Solution

The fourth proportional to 15,453.60, 21,325.96 and 8,380 is: 11,564.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,453.60 : 21,325.96 = 8,380 : x
  2. Step 2: Convert to fraction form
    15,453.60/21,325.96 = 8,380/x
  3. Step 3: Cross multiply
    15,453.60x = 21,325.96 × 8,380
  4. Step 4: Simplify right side
    15,453.60x = 178,711,544.80
  5. Step 5: Solve for x
    x = 178,711,544.80/15,453.60
  6. Step 6: Final answer
    x = 11,564.40

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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.