Home / 9,990.29-13,785.62-5,513.75

Finding the Fourth Proportional to 9,990.29, 13,785.62 and 5,513.75

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Solution

The fourth proportional to 9,990.29, 13,785.62 and 5,513.75 is: 7,608.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.29 : 13,785.62 = 5,513.75 : x
  2. Step 2: Convert to fraction form
    9,990.29/13,785.62 = 5,513.75/x
  3. Step 3: Cross multiply
    9,990.29x = 13,785.62 × 5,513.75
  4. Step 4: Simplify right side
    9,990.29x = 76,010,445.10
  5. Step 5: Solve for x
    x = 76,010,445.10/9,990.29
  6. Step 6: Final answer
    x = 7,608.43

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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.