Home / 15,084.80-20,817.24-9,115.64

Finding the Fourth Proportional to 15,084.80, 20,817.24 and 9,115.64

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Solution

The fourth proportional to 15,084.80, 20,817.24 and 9,115.64 is: 12,579.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,084.80 : 20,817.24 = 9,115.64 : x
  2. Step 2: Convert to fraction form
    15,084.80/20,817.24 = 9,115.64/x
  3. Step 3: Cross multiply
    15,084.80x = 20,817.24 × 9,115.64
  4. Step 4: Simplify right side
    15,084.80x = 189,762,465.63
  5. Step 5: Solve for x
    x = 189,762,465.63/15,084.80
  6. Step 6: Final answer
    x = 12,579.71

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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.