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Finding the Fourth Proportional to 7,647.94, 10,553.99 and 4,290.68

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Solution

The fourth proportional to 7,647.94, 10,553.99 and 4,290.68 is: 5,921.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,647.94 : 10,553.99 = 4,290.68 : x
  2. Step 2: Convert to fraction form
    7,647.94/10,553.99 = 4,290.68/x
  3. Step 3: Cross multiply
    7,647.94x = 10,553.99 × 4,290.68
  4. Step 4: Simplify right side
    7,647.94x = 45,283,793.81
  5. Step 5: Solve for x
    x = 45,283,793.81/7,647.94
  6. Step 6: Final answer
    x = 5,921.04

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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.