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Finding the Fourth Proportional to 7,745.71, 10,688.70 and 4,208.80

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Solution

The fourth proportional to 7,745.71, 10,688.70 and 4,208.80 is: 5,807.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,745.71 : 10,688.70 = 4,208.80 : x
  2. Step 2: Convert to fraction form
    7,745.71/10,688.70 = 4,208.80/x
  3. Step 3: Cross multiply
    7,745.71x = 10,688.70 × 4,208.80
  4. Step 4: Simplify right side
    7,745.71x = 44,986,600.56
  5. Step 5: Solve for x
    x = 44,986,600.56/7,745.71
  6. Step 6: Final answer
    x = 5,807.94

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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.