Home / 7,772.39-11,655.50-3,386.78

Finding the Fourth Proportional to 7,772.39, 11,655.50 and 3,386.78

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Solution

The fourth proportional to 7,772.39, 11,655.50 and 3,386.78 is: 5,078.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,772.39 : 11,655.50 = 3,386.78 : x
  2. Step 2: Convert to fraction form
    7,772.39/11,655.50 = 3,386.78/x
  3. Step 3: Cross multiply
    7,772.39x = 11,655.50 × 3,386.78
  4. Step 4: Simplify right side
    7,772.39x = 39,474,539.08
  5. Step 5: Solve for x
    x = 39,474,539.08/7,772.39
  6. Step 6: Final answer
    x = 5,078.82

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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.