Home / 19,910.10-29,865.51-5,119.20

Finding the Fourth Proportional to 19,910.10, 29,865.51 and 5,119.20

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Solution

The fourth proportional to 19,910.10, 29,865.51 and 5,119.20 is: 7,678.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,910.10 : 29,865.51 = 5,119.20 : x
  2. Step 2: Convert to fraction form
    19,910.10/29,865.51 = 5,119.20/x
  3. Step 3: Cross multiply
    19,910.10x = 29,865.51 × 5,119.20
  4. Step 4: Simplify right side
    19,910.10x = 152,887,518.79
  5. Step 5: Solve for x
    x = 152,887,518.79/19,910.10
  6. Step 6: Final answer
    x = 7,678.89

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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.