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Finding the Fourth Proportional to 7,073.19, 9,760.91 and 3,929.31

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Solution

The fourth proportional to 7,073.19, 9,760.91 and 3,929.31 is: 5,422.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,073.19 : 9,760.91 = 3,929.31 : x
  2. Step 2: Convert to fraction form
    7,073.19/9,760.91 = 3,929.31/x
  3. Step 3: Cross multiply
    7,073.19x = 9,760.91 × 3,929.31
  4. Step 4: Simplify right side
    7,073.19x = 38,353,621.63
  5. Step 5: Solve for x
    x = 38,353,621.63/7,073.19
  6. Step 6: Final answer
    x = 5,422.39

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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.