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Finding the Fourth Proportional to 5,389.91, 7,437.21 and 3,031.91

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Solution

The fourth proportional to 5,389.91, 7,437.21 and 3,031.91 is: 4,183.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,389.91 : 7,437.21 = 3,031.91 : x
  2. Step 2: Convert to fraction form
    5,389.91/7,437.21 = 3,031.91/x
  3. Step 3: Cross multiply
    5,389.91x = 7,437.21 × 3,031.91
  4. Step 4: Simplify right side
    5,389.91x = 22,548,951.37
  5. Step 5: Solve for x
    x = 22,548,951.37/5,389.91
  6. Step 6: Final answer
    x = 4,183.55

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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.