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Finding the Fourth Proportional to 7,891.71, 10,895.76 and 4,911.72

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Solution

The fourth proportional to 7,891.71, 10,895.76 and 4,911.72 is: 6,781.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.71 : 10,895.76 = 4,911.72 : x
  2. Step 2: Convert to fraction form
    7,891.71/10,895.76 = 4,911.72/x
  3. Step 3: Cross multiply
    7,891.71x = 10,895.76 × 4,911.72
  4. Step 4: Simplify right side
    7,891.71x = 53,516,922.31
  5. Step 5: Solve for x
    x = 53,516,922.31/7,891.71
  6. Step 6: Final answer
    x = 6,781.41

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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.