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Finding the Fourth Proportional to 9,989.93, 13,785.93 and 5,452.65

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Solution

The fourth proportional to 9,989.93, 13,785.93 and 5,452.65 is: 7,524.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,989.93 : 13,785.93 = 5,452.65 : x
  2. Step 2: Convert to fraction form
    9,989.93/13,785.93 = 5,452.65/x
  3. Step 3: Cross multiply
    9,989.93x = 13,785.93 × 5,452.65
  4. Step 4: Simplify right side
    9,989.93x = 75,169,851.21
  5. Step 5: Solve for x
    x = 75,169,851.21/9,989.93
  6. Step 6: Final answer
    x = 7,524.56

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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.