Home / 10,138.98-15,199.66-4,871.35

Finding the Fourth Proportional to 10,138.98, 15,199.66 and 4,871.35

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Solution

The fourth proportional to 10,138.98, 15,199.66 and 4,871.35 is: 7,302.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,138.98 : 15,199.66 = 4,871.35 : x
  2. Step 2: Convert to fraction form
    10,138.98/15,199.66 = 4,871.35/x
  3. Step 3: Cross multiply
    10,138.98x = 15,199.66 × 4,871.35
  4. Step 4: Simplify right side
    10,138.98x = 74,042,775.93
  5. Step 5: Solve for x
    x = 74,042,775.93/10,138.98
  6. Step 6: Final answer
    x = 7,302.78

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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.