Home / 57,880.72-86,822.12-20,439.88

Finding the Fourth Proportional to 57,880.72, 86,822.12 and 20,439.88

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Solution

The fourth proportional to 57,880.72, 86,822.12 and 20,439.88 is: 30,660.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,880.72 : 86,822.12 = 20,439.88 : x
  2. Step 2: Convert to fraction form
    57,880.72/86,822.12 = 20,439.88/x
  3. Step 3: Cross multiply
    57,880.72x = 86,822.12 × 20,439.88
  4. Step 4: Simplify right side
    57,880.72x = 1,774,633,714.15
  5. Step 5: Solve for x
    x = 1,774,633,714.15/57,880.72
  6. Step 6: Final answer
    x = 30,660.19

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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.