Home / 8,939.58-12,338.37-5,165.19

Finding the Fourth Proportional to 8,939.58, 12,338.37 and 5,165.19

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Solution

The fourth proportional to 8,939.58, 12,338.37 and 5,165.19 is: 7,128.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,939.58 : 12,338.37 = 5,165.19 : x
  2. Step 2: Convert to fraction form
    8,939.58/12,338.37 = 5,165.19/x
  3. Step 3: Cross multiply
    8,939.58x = 12,338.37 × 5,165.19
  4. Step 4: Simplify right side
    8,939.58x = 63,730,025.34
  5. Step 5: Solve for x
    x = 63,730,025.34/8,939.58
  6. Step 6: Final answer
    x = 7,128.97

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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.