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Finding the Fourth Proportional to 7,891.39, 10,891.53 and 4,704.89

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Solution

The fourth proportional to 7,891.39, 10,891.53 and 4,704.89 is: 6,493.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.39 : 10,891.53 = 4,704.89 : x
  2. Step 2: Convert to fraction form
    7,891.39/10,891.53 = 4,704.89/x
  3. Step 3: Cross multiply
    7,891.39x = 10,891.53 × 4,704.89
  4. Step 4: Simplify right side
    7,891.39x = 51,243,466.05
  5. Step 5: Solve for x
    x = 51,243,466.05/7,891.39
  6. Step 6: Final answer
    x = 6,493.59

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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.