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Finding the Fourth Proportional to 6,888.92, 10,320.42 and 3,428.60

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Solution

The fourth proportional to 6,888.92, 10,320.42 and 3,428.60 is: 5,136.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,888.92 : 10,320.42 = 3,428.60 : x
  2. Step 2: Convert to fraction form
    6,888.92/10,320.42 = 3,428.60/x
  3. Step 3: Cross multiply
    6,888.92x = 10,320.42 × 3,428.60
  4. Step 4: Simplify right side
    6,888.92x = 35,384,592.01
  5. Step 5: Solve for x
    x = 35,384,592.01/6,888.92
  6. Step 6: Final answer
    x = 5,136.45

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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.