Home / 9,986.40-13,781.96-5,738.16

Finding the Fourth Proportional to 9,986.40, 13,781.96 and 5,738.16

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Solution

The fourth proportional to 9,986.40, 13,781.96 and 5,738.16 is: 7,919.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,986.40 : 13,781.96 = 5,738.16 : x
  2. Step 2: Convert to fraction form
    9,986.40/13,781.96 = 5,738.16/x
  3. Step 3: Cross multiply
    9,986.40x = 13,781.96 × 5,738.16
  4. Step 4: Simplify right side
    9,986.40x = 79,083,062.90
  5. Step 5: Solve for x
    x = 79,083,062.90/9,986.40
  6. Step 6: Final answer
    x = 7,919.08

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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.