Home / 18,721.29-28,081.85-4,870.25

Finding the Fourth Proportional to 18,721.29, 28,081.85 and 4,870.25

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Solution

The fourth proportional to 18,721.29, 28,081.85 and 4,870.25 is: 7,305.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.29 : 28,081.85 = 4,870.25 : x
  2. Step 2: Convert to fraction form
    18,721.29/28,081.85 = 4,870.25/x
  3. Step 3: Cross multiply
    18,721.29x = 28,081.85 × 4,870.25
  4. Step 4: Simplify right side
    18,721.29x = 136,765,629.96
  5. Step 5: Solve for x
    x = 136,765,629.96/18,721.29
  6. Step 6: Final answer
    x = 7,305.35

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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.