Home / 20,939.58-31,371.90-11,056.74

Finding the Fourth Proportional to 20,939.58, 31,371.90 and 11,056.74

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Solution

The fourth proportional to 20,939.58, 31,371.90 and 11,056.74 is: 16,565.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.58 : 31,371.90 = 11,056.74 : x
  2. Step 2: Convert to fraction form
    20,939.58/31,371.90 = 11,056.74/x
  3. Step 3: Cross multiply
    20,939.58x = 31,371.90 × 11,056.74
  4. Step 4: Simplify right side
    20,939.58x = 346,870,941.61
  5. Step 5: Solve for x
    x = 346,870,941.61/20,939.58
  6. Step 6: Final answer
    x = 16,565.32

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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.