Home / 8,713.15-12,022.75-5,128.29

Finding the Fourth Proportional to 8,713.15, 12,022.75 and 5,128.29

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Solution

The fourth proportional to 8,713.15, 12,022.75 and 5,128.29 is: 7,076.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,713.15 : 12,022.75 = 5,128.29 : x
  2. Step 2: Convert to fraction form
    8,713.15/12,022.75 = 5,128.29/x
  3. Step 3: Cross multiply
    8,713.15x = 12,022.75 × 5,128.29
  4. Step 4: Simplify right side
    8,713.15x = 61,656,148.60
  5. Step 5: Solve for x
    x = 61,656,148.60/8,713.15
  6. Step 6: Final answer
    x = 7,076.22

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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.