Home / 9,988.78-13,784.57-5,512.54

Finding the Fourth Proportional to 9,988.78, 13,784.57 and 5,512.54

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Solution

The fourth proportional to 9,988.78, 13,784.57 and 5,512.54 is: 7,607.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,988.78 : 13,784.57 = 5,512.54 : x
  2. Step 2: Convert to fraction form
    9,988.78/13,784.57 = 5,512.54/x
  3. Step 3: Cross multiply
    9,988.78x = 13,784.57 × 5,512.54
  4. Step 4: Simplify right side
    9,988.78x = 75,987,993.51
  5. Step 5: Solve for x
    x = 75,987,993.51/9,988.78
  6. Step 6: Final answer
    x = 7,607.33

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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.