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Finding the Fourth Proportional to 5,281.13, 7,921.80 and 1,995.77

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Solution

The fourth proportional to 5,281.13, 7,921.80 and 1,995.77 is: 2,993.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,281.13 : 7,921.80 = 1,995.77 : x
  2. Step 2: Convert to fraction form
    5,281.13/7,921.80 = 1,995.77/x
  3. Step 3: Cross multiply
    5,281.13x = 7,921.80 × 1,995.77
  4. Step 4: Simplify right side
    5,281.13x = 15,810,051.18
  5. Step 5: Solve for x
    x = 15,810,051.18/5,281.13
  6. Step 6: Final answer
    x = 2,993.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.