Home / 13,128.55-19,686.90-3,766.45

Finding the Fourth Proportional to 13,128.55, 19,686.90 and 3,766.45

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Solution

The fourth proportional to 13,128.55, 19,686.90 and 3,766.45 is: 5,647.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.55 : 19,686.90 = 3,766.45 : x
  2. Step 2: Convert to fraction form
    13,128.55/19,686.90 = 3,766.45/x
  3. Step 3: Cross multiply
    13,128.55x = 19,686.90 × 3,766.45
  4. Step 4: Simplify right side
    13,128.55x = 74,149,726.32
  5. Step 5: Solve for x
    x = 74,149,726.32/13,128.55
  6. Step 6: Final answer
    x = 5,647.97

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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.