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Finding the Fourth Proportional to 7,191.92, 9,919.74 and 4,800.69

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Solution

The fourth proportional to 7,191.92, 9,919.74 and 4,800.69 is: 6,621.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,191.92 : 9,919.74 = 4,800.69 : x
  2. Step 2: Convert to fraction form
    7,191.92/9,919.74 = 4,800.69/x
  3. Step 3: Cross multiply
    7,191.92x = 9,919.74 × 4,800.69
  4. Step 4: Simplify right side
    7,191.92x = 47,621,565.82
  5. Step 5: Solve for x
    x = 47,621,565.82/7,191.92
  6. Step 6: Final answer
    x = 6,621.53

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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.