Home / 20,866.19-31,257.54-12,541.68

Finding the Fourth Proportional to 20,866.19, 31,257.54 and 12,541.68

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Solution

The fourth proportional to 20,866.19, 31,257.54 and 12,541.68 is: 18,787.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.19 : 31,257.54 = 12,541.68 : x
  2. Step 2: Convert to fraction form
    20,866.19/31,257.54 = 12,541.68/x
  3. Step 3: Cross multiply
    20,866.19x = 31,257.54 × 12,541.68
  4. Step 4: Simplify right side
    20,866.19x = 392,022,064.27
  5. Step 5: Solve for x
    x = 392,022,064.27/20,866.19
  6. Step 6: Final answer
    x = 18,787.43

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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.