Home / 5,011.78-7,507.40-2,815.90

Finding the Fourth Proportional to 5,011.78, 7,507.40 and 2,815.90

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Solution

The fourth proportional to 5,011.78, 7,507.40 and 2,815.90 is: 4,218.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,011.78 : 7,507.40 = 2,815.90 : x
  2. Step 2: Convert to fraction form
    5,011.78/7,507.40 = 2,815.90/x
  3. Step 3: Cross multiply
    5,011.78x = 7,507.40 × 2,815.90
  4. Step 4: Simplify right side
    5,011.78x = 21,140,087.66
  5. Step 5: Solve for x
    x = 21,140,087.66/5,011.78
  6. Step 6: Final answer
    x = 4,218.08

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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.