Home / 19,178.40-28,765.36-5,139.64

Finding the Fourth Proportional to 19,178.40, 28,765.36 and 5,139.64

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Solution

The fourth proportional to 19,178.40, 28,765.36 and 5,139.64 is: 7,708.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,178.40 : 28,765.36 = 5,139.64 : x
  2. Step 2: Convert to fraction form
    19,178.40/28,765.36 = 5,139.64/x
  3. Step 3: Cross multiply
    19,178.40x = 28,765.36 × 5,139.64
  4. Step 4: Simplify right side
    19,178.40x = 147,843,594.87
  5. Step 5: Solve for x
    x = 147,843,594.87/19,178.40
  6. Step 6: Final answer
    x = 7,708.86

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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.