Home / 20,976.74-31,455.87-11,113.74

Finding the Fourth Proportional to 20,976.74, 31,455.87 and 11,113.74

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Solution

The fourth proportional to 20,976.74, 31,455.87 and 11,113.74 is: 16,665.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.74 : 31,455.87 = 11,113.74 : x
  2. Step 2: Convert to fraction form
    20,976.74/31,455.87 = 11,113.74/x
  3. Step 3: Cross multiply
    20,976.74x = 31,455.87 × 11,113.74
  4. Step 4: Simplify right side
    20,976.74x = 349,592,360.65
  5. Step 5: Solve for x
    x = 349,592,360.65/20,976.74
  6. Step 6: Final answer
    x = 16,665.72

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1.5x scale

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.