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Finding the Fourth Proportional to 7,352.78, 11,031.90 and 3,405.95

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Solution

The fourth proportional to 7,352.78, 11,031.90 and 3,405.95 is: 5,110.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,352.78 : 11,031.90 = 3,405.95 : x
  2. Step 2: Convert to fraction form
    7,352.78/11,031.90 = 3,405.95/x
  3. Step 3: Cross multiply
    7,352.78x = 11,031.90 × 3,405.95
  4. Step 4: Simplify right side
    7,352.78x = 37,574,073.24
  5. Step 5: Solve for x
    x = 37,574,073.24/7,352.78
  6. Step 6: Final answer
    x = 5,110.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.