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Finding the Fourth Proportional to 15,175.65, 20,955.62 and 9,520.12

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Solution

The fourth proportional to 15,175.65, 20,955.62 and 9,520.12 is: 13,146.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,175.65 : 20,955.62 = 9,520.12 : x
  2. Step 2: Convert to fraction form
    15,175.65/20,955.62 = 9,520.12/x
  3. Step 3: Cross multiply
    15,175.65x = 20,955.62 × 9,520.12
  4. Step 4: Simplify right side
    15,175.65x = 199,499,917.08
  5. Step 5: Solve for x
    x = 199,499,917.08/15,175.65
  6. Step 6: Final answer
    x = 13,146.05

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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.