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Finding the Fourth Proportional to 7,891.52, 10,890.08 and 4,306.56

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Solution

The fourth proportional to 7,891.52, 10,890.08 and 4,306.56 is: 5,942.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.52 : 10,890.08 = 4,306.56 : x
  2. Step 2: Convert to fraction form
    7,891.52/10,890.08 = 4,306.56/x
  3. Step 3: Cross multiply
    7,891.52x = 10,890.08 × 4,306.56
  4. Step 4: Simplify right side
    7,891.52x = 46,898,782.92
  5. Step 5: Solve for x
    x = 46,898,782.92/7,891.52
  6. Step 6: Final answer
    x = 5,942.93

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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.