Home / 20,787.87-31,192.23-9,695.43

Finding the Fourth Proportional to 20,787.87, 31,192.23 and 9,695.43

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Solution

The fourth proportional to 20,787.87, 31,192.23 and 9,695.43 is: 14,548.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.87 : 31,192.23 = 9,695.43 : x
  2. Step 2: Convert to fraction form
    20,787.87/31,192.23 = 9,695.43/x
  3. Step 3: Cross multiply
    20,787.87x = 31,192.23 × 9,695.43
  4. Step 4: Simplify right side
    20,787.87x = 302,422,082.51
  5. Step 5: Solve for x
    x = 302,422,082.51/20,787.87
  6. Step 6: Final answer
    x = 14,548.01

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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.