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Finding the Fourth Proportional to 7,909.71, 10,918.98 and 5,081.19

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Solution

The fourth proportional to 7,909.71, 10,918.98 and 5,081.19 is: 7,014.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,909.71 : 10,918.98 = 5,081.19 : x
  2. Step 2: Convert to fraction form
    7,909.71/10,918.98 = 5,081.19/x
  3. Step 3: Cross multiply
    7,909.71x = 10,918.98 × 5,081.19
  4. Step 4: Simplify right side
    7,909.71x = 55,481,411.99
  5. Step 5: Solve for x
    x = 55,481,411.99/7,909.71
  6. Step 6: Final answer
    x = 7,014.34

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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.