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Finding the Fourth Proportional to 7,681.80, 10,600.79 and 4,278.81

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Solution

The fourth proportional to 7,681.80, 10,600.79 and 4,278.81 is: 5,904.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,681.80 : 10,600.79 = 4,278.81 : x
  2. Step 2: Convert to fraction form
    7,681.80/10,600.79 = 4,278.81/x
  3. Step 3: Cross multiply
    7,681.80x = 10,600.79 × 4,278.81
  4. Step 4: Simplify right side
    7,681.80x = 45,358,744.87
  5. Step 5: Solve for x
    x = 45,358,744.87/7,681.80
  6. Step 6: Final answer
    x = 5,904.70

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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.