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Finding the Fourth Proportional to 7,891.74, 10,889.43 and 4,355.10

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Solution

The fourth proportional to 7,891.74, 10,889.43 and 4,355.10 is: 6,009.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.74 : 10,889.43 = 4,355.10 : x
  2. Step 2: Convert to fraction form
    7,891.74/10,889.43 = 4,355.10/x
  3. Step 3: Cross multiply
    7,891.74x = 10,889.43 × 4,355.10
  4. Step 4: Simplify right side
    7,891.74x = 47,424,556.59
  5. Step 5: Solve for x
    x = 47,424,556.59/7,891.74
  6. Step 6: Final answer
    x = 6,009.39

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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.