Home / 21,845.20-32,719.20-18,929.20

Finding the Fourth Proportional to 21,845.20, 32,719.20 and 18,929.20

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Solution

The fourth proportional to 21,845.20, 32,719.20 and 18,929.20 is: 28,351.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,845.20 : 32,719.20 = 18,929.20 : x
  2. Step 2: Convert to fraction form
    21,845.20/32,719.20 = 18,929.20/x
  3. Step 3: Cross multiply
    21,845.20x = 32,719.20 × 18,929.20
  4. Step 4: Simplify right side
    21,845.20x = 619,348,280.64
  5. Step 5: Solve for x
    x = 619,348,280.64/21,845.20
  6. Step 6: Final answer
    x = 28,351.69

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1.5x scale

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.