Home / 9,161.44-12,641.90-5,128.05

Finding the Fourth Proportional to 9,161.44, 12,641.90 and 5,128.05

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Solution

The fourth proportional to 9,161.44, 12,641.90 and 5,128.05 is: 7,076.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,161.44 : 12,641.90 = 5,128.05 : x
  2. Step 2: Convert to fraction form
    9,161.44/12,641.90 = 5,128.05/x
  3. Step 3: Cross multiply
    9,161.44x = 12,641.90 × 5,128.05
  4. Step 4: Simplify right side
    9,161.44x = 64,828,295.30
  5. Step 5: Solve for x
    x = 64,828,295.30/9,161.44
  6. Step 6: Final answer
    x = 7,076.21

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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.