Home / 18,721.26-28,081.35-4,870.26

Finding the Fourth Proportional to 18,721.26, 28,081.35 and 4,870.26

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Solution

The fourth proportional to 18,721.26, 28,081.35 and 4,870.26 is: 7,305.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.26 : 28,081.35 = 4,870.26 : x
  2. Step 2: Convert to fraction form
    18,721.26/28,081.35 = 4,870.26/x
  3. Step 3: Cross multiply
    18,721.26x = 28,081.35 × 4,870.26
  4. Step 4: Simplify right side
    18,721.26x = 136,763,475.65
  5. Step 5: Solve for x
    x = 136,763,475.65/18,721.26
  6. Step 6: Final answer
    x = 7,305.25

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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.