Home / 10,518.55-15,777.67-3,128.01

Finding the Fourth Proportional to 10,518.55, 15,777.67 and 3,128.01

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Solution

The fourth proportional to 10,518.55, 15,777.67 and 3,128.01 is: 4,691.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,518.55 : 15,777.67 = 3,128.01 : x
  2. Step 2: Convert to fraction form
    10,518.55/15,777.67 = 3,128.01/x
  3. Step 3: Cross multiply
    10,518.55x = 15,777.67 × 3,128.01
  4. Step 4: Simplify right side
    10,518.55x = 49,352,709.54
  5. Step 5: Solve for x
    x = 49,352,709.54/10,518.55
  6. Step 6: Final answer
    x = 4,691.97

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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.