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Finding the Fourth Proportional to 7,042.65, 9,719.16 and 3,898.84

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Solution

The fourth proportional to 7,042.65, 9,719.16 and 3,898.84 is: 5,380.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,042.65 : 9,719.16 = 3,898.84 : x
  2. Step 2: Convert to fraction form
    7,042.65/9,719.16 = 3,898.84/x
  3. Step 3: Cross multiply
    7,042.65x = 9,719.16 × 3,898.84
  4. Step 4: Simplify right side
    7,042.65x = 37,893,425.48
  5. Step 5: Solve for x
    x = 37,893,425.48/7,042.65
  6. Step 6: Final answer
    x = 5,380.56

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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.