Home / 21,720.78-32,582.88-6,138.54

Finding the Fourth Proportional to 21,720.78, 32,582.88 and 6,138.54

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Solution

The fourth proportional to 21,720.78, 32,582.88 and 6,138.54 is: 9,208.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,720.78 : 32,582.88 = 6,138.54 : x
  2. Step 2: Convert to fraction form
    21,720.78/32,582.88 = 6,138.54/x
  3. Step 3: Cross multiply
    21,720.78x = 32,582.88 × 6,138.54
  4. Step 4: Simplify right side
    21,720.78x = 200,011,312.20
  5. Step 5: Solve for x
    x = 200,011,312.20/21,720.78
  6. Step 6: Final answer
    x = 9,208.29

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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.