Home / 19,086.40-28,629.80-5,235.40

Finding the Fourth Proportional to 19,086.40, 28,629.80 and 5,235.40

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Solution

The fourth proportional to 19,086.40, 28,629.80 and 5,235.40 is: 7,853.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,086.40 : 28,629.80 = 5,235.40 : x
  2. Step 2: Convert to fraction form
    19,086.40/28,629.80 = 5,235.40/x
  3. Step 3: Cross multiply
    19,086.40x = 28,629.80 × 5,235.40
  4. Step 4: Simplify right side
    19,086.40x = 149,888,454.92
  5. Step 5: Solve for x
    x = 149,888,454.92/19,086.40
  6. Step 6: Final answer
    x = 7,853.15

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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.