Home / 7,778.14-10,676.40-6,920.06

Finding the Fourth Proportional to 7,778.14, 10,676.40 and 6,920.06

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Solution

The fourth proportional to 7,778.14, 10,676.40 and 6,920.06 is: 9,498.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,778.14 : 10,676.40 = 6,920.06 : x
  2. Step 2: Convert to fraction form
    7,778.14/10,676.40 = 6,920.06/x
  3. Step 3: Cross multiply
    7,778.14x = 10,676.40 × 6,920.06
  4. Step 4: Simplify right side
    7,778.14x = 73,881,328.58
  5. Step 5: Solve for x
    x = 73,881,328.58/7,778.14
  6. Step 6: Final answer
    x = 9,498.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.