Home / 7,764.84-11,647.12-1,921.45

Finding the Fourth Proportional to 7,764.84, 11,647.12 and 1,921.45

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Solution

The fourth proportional to 7,764.84, 11,647.12 and 1,921.45 is: 2,882.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,764.84 : 11,647.12 = 1,921.45 : x
  2. Step 2: Convert to fraction form
    7,764.84/11,647.12 = 1,921.45/x
  3. Step 3: Cross multiply
    7,764.84x = 11,647.12 × 1,921.45
  4. Step 4: Simplify right side
    7,764.84x = 22,379,358.72
  5. Step 5: Solve for x
    x = 22,379,358.72/7,764.84
  6. Step 6: Final answer
    x = 2,882.14

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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.