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Finding the Fourth Proportional to 7,239.99, 9,991.02 and 4,255.91

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Solution

The fourth proportional to 7,239.99, 9,991.02 and 4,255.91 is: 5,873.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,239.99 : 9,991.02 = 4,255.91 : x
  2. Step 2: Convert to fraction form
    7,239.99/9,991.02 = 4,255.91/x
  3. Step 3: Cross multiply
    7,239.99x = 9,991.02 × 4,255.91
  4. Step 4: Simplify right side
    7,239.99x = 42,520,881.93
  5. Step 5: Solve for x
    x = 42,520,881.93/7,239.99
  6. Step 6: Final answer
    x = 5,873.06

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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.