Home / 57,721.28-86,579.20-18,280.64

Finding the Fourth Proportional to 57,721.28, 86,579.20 and 18,280.64

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Solution

The fourth proportional to 57,721.28, 86,579.20 and 18,280.64 is: 27,420.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,721.28 : 86,579.20 = 18,280.64 : x
  2. Step 2: Convert to fraction form
    57,721.28/86,579.20 = 18,280.64/x
  3. Step 3: Cross multiply
    57,721.28x = 86,579.20 × 18,280.64
  4. Step 4: Simplify right side
    57,721.28x = 1,582,723,186.69
  5. Step 5: Solve for x
    x = 1,582,723,186.69/57,721.28
  6. Step 6: Final answer
    x = 27,420.10

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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.