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Finding the Fourth Proportional to 7,716.80, 10,649.19 and 4,180.01

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Solution

The fourth proportional to 7,716.80, 10,649.19 and 4,180.01 is: 5,768.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,716.80 : 10,649.19 = 4,180.01 : x
  2. Step 2: Convert to fraction form
    7,716.80/10,649.19 = 4,180.01/x
  3. Step 3: Cross multiply
    7,716.80x = 10,649.19 × 4,180.01
  4. Step 4: Simplify right side
    7,716.80x = 44,513,677.80
  5. Step 5: Solve for x
    x = 44,513,677.80/7,716.80
  6. Step 6: Final answer
    x = 5,768.41

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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.