Home / 19,872.81-29,809.10-5,081.70

Finding the Fourth Proportional to 19,872.81, 29,809.10 and 5,081.70

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Solution

The fourth proportional to 19,872.81, 29,809.10 and 5,081.70 is: 7,622.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,872.81 : 29,809.10 = 5,081.70 : x
  2. Step 2: Convert to fraction form
    19,872.81/29,809.10 = 5,081.70/x
  3. Step 3: Cross multiply
    19,872.81x = 29,809.10 × 5,081.70
  4. Step 4: Simplify right side
    19,872.81x = 151,480,878.06
  5. Step 5: Solve for x
    x = 151,480,878.06/19,872.81
  6. Step 6: Final answer
    x = 7,622.52

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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.