Home / 7,088.10-9,781.40-3,857.78

Finding the Fourth Proportional to 7,088.10, 9,781.40 and 3,857.78

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Solution

The fourth proportional to 7,088.10, 9,781.40 and 3,857.78 is: 5,323.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,088.10 : 9,781.40 = 3,857.78 : x
  2. Step 2: Convert to fraction form
    7,088.10/9,781.40 = 3,857.78/x
  3. Step 3: Cross multiply
    7,088.10x = 9,781.40 × 3,857.78
  4. Step 4: Simplify right side
    7,088.10x = 37,734,494.46
  5. Step 5: Solve for x
    x = 37,734,494.46/7,088.10
  6. Step 6: Final answer
    x = 5,323.64

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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.