Home / 9,181.80-12,671.28-6,939.72

Finding the Fourth Proportional to 9,181.80, 12,671.28 and 6,939.72

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Solution

The fourth proportional to 9,181.80, 12,671.28 and 6,939.72 is: 9,577.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,181.80 : 12,671.28 = 6,939.72 : x
  2. Step 2: Convert to fraction form
    9,181.80/12,671.28 = 6,939.72/x
  3. Step 3: Cross multiply
    9,181.80x = 12,671.28 × 6,939.72
  4. Step 4: Simplify right side
    9,181.80x = 87,935,135.24
  5. Step 5: Solve for x
    x = 87,935,135.24/9,181.80
  6. Step 6: Final answer
    x = 9,577.11

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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.