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Finding the Fourth Proportional to 5,712.91, 7,889.91 and 5,491.51

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Solution

The fourth proportional to 5,712.91, 7,889.91 and 5,491.51 is: 7,584.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,712.91 : 7,889.91 = 5,491.51 : x
  2. Step 2: Convert to fraction form
    5,712.91/7,889.91 = 5,491.51/x
  3. Step 3: Cross multiply
    5,712.91x = 7,889.91 × 5,491.51
  4. Step 4: Simplify right side
    5,712.91x = 43,327,519.66
  5. Step 5: Solve for x
    x = 43,327,519.66/5,712.91
  6. Step 6: Final answer
    x = 7,584.14

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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.