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Finding the Fourth Proportional to 7,347.40, 11,021.10 and 3,891.40

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Solution

The fourth proportional to 7,347.40, 11,021.10 and 3,891.40 is: 5,837.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,347.40 : 11,021.10 = 3,891.40 : x
  2. Step 2: Convert to fraction form
    7,347.40/11,021.10 = 3,891.40/x
  3. Step 3: Cross multiply
    7,347.40x = 11,021.10 × 3,891.40
  4. Step 4: Simplify right side
    7,347.40x = 42,887,508.54
  5. Step 5: Solve for x
    x = 42,887,508.54/7,347.40
  6. Step 6: Final answer
    x = 5,837.10

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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.