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Finding the Fourth Proportional to 7,340.50, 10,129.89 and 4,028.50

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Solution

The fourth proportional to 7,340.50, 10,129.89 and 4,028.50 is: 5,559.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,340.50 : 10,129.89 = 4,028.50 : x
  2. Step 2: Convert to fraction form
    7,340.50/10,129.89 = 4,028.50/x
  3. Step 3: Cross multiply
    7,340.50x = 10,129.89 × 4,028.50
  4. Step 4: Simplify right side
    7,340.50x = 40,808,261.87
  5. Step 5: Solve for x
    x = 40,808,261.87/7,340.50
  6. Step 6: Final answer
    x = 5,559.33

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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.