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Finding the Fourth Proportional to 7,239.44, 9,990.90 and 4,053.03

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Solution

The fourth proportional to 7,239.44, 9,990.90 and 4,053.03 is: 5,593.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,239.44 : 9,990.90 = 4,053.03 : x
  2. Step 2: Convert to fraction form
    7,239.44/9,990.90 = 4,053.03/x
  3. Step 3: Cross multiply
    7,239.44x = 9,990.90 × 4,053.03
  4. Step 4: Simplify right side
    7,239.44x = 40,493,417.43
  5. Step 5: Solve for x
    x = 40,493,417.43/7,239.44
  6. Step 6: Final answer
    x = 5,593.45

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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.