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Finding the Fourth Proportional to 7,919, 10,928.08 and 4,561.80

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Solution

The fourth proportional to 7,919, 10,928.08 and 4,561.80 is: 6,295.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919 : 10,928.08 = 4,561.80 : x
  2. Step 2: Convert to fraction form
    7,919/10,928.08 = 4,561.80/x
  3. Step 3: Cross multiply
    7,919x = 10,928.08 × 4,561.80
  4. Step 4: Simplify right side
    7,919x = 49,851,715.34
  5. Step 5: Solve for x
    x = 49,851,715.34/7,919
  6. Step 6: Final answer
    x = 6,295.20

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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.