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Finding the Fourth Proportional to 7,048.91, 9,727.81 and 3,905.10

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Solution

The fourth proportional to 7,048.91, 9,727.81 and 3,905.10 is: 5,389.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,048.91 : 9,727.81 = 3,905.10 : x
  2. Step 2: Convert to fraction form
    7,048.91/9,727.81 = 3,905.10/x
  3. Step 3: Cross multiply
    7,048.91x = 9,727.81 × 3,905.10
  4. Step 4: Simplify right side
    7,048.91x = 37,988,070.83
  5. Step 5: Solve for x
    x = 37,988,070.83/7,048.91
  6. Step 6: Final answer
    x = 5,389.21

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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.