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Finding the Fourth Proportional to 15,399.60, 23,083.20 and 8,811.60

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Solution

The fourth proportional to 15,399.60, 23,083.20 and 8,811.60 is: 13,208.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,399.60 : 23,083.20 = 8,811.60 : x
  2. Step 2: Convert to fraction form
    15,399.60/23,083.20 = 8,811.60/x
  3. Step 3: Cross multiply
    15,399.60x = 23,083.20 × 8,811.60
  4. Step 4: Simplify right side
    15,399.60x = 203,399,925.12
  5. Step 5: Solve for x
    x = 203,399,925.12/15,399.60
  6. Step 6: Final answer
    x = 13,208.13

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1.5x scale

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.