Home / 7,780.05-11,672.10-4,081.29

Finding the Fourth Proportional to 7,780.05, 11,672.10 and 4,081.29

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Solution

The fourth proportional to 7,780.05, 11,672.10 and 4,081.29 is: 6,122.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,780.05 : 11,672.10 = 4,081.29 : x
  2. Step 2: Convert to fraction form
    7,780.05/11,672.10 = 4,081.29/x
  3. Step 3: Cross multiply
    7,780.05x = 11,672.10 × 4,081.29
  4. Step 4: Simplify right side
    7,780.05x = 47,637,181.24
  5. Step 5: Solve for x
    x = 47,637,181.24/7,780.05
  6. Step 6: Final answer
    x = 6,122.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.