Home / 20,801.16-31,211.87-9,112.86

Finding the Fourth Proportional to 20,801.16, 31,211.87 and 9,112.86

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Solution

The fourth proportional to 20,801.16, 31,211.87 and 9,112.86 is: 13,673.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.16 : 31,211.87 = 9,112.86 : x
  2. Step 2: Convert to fraction form
    20,801.16/31,211.87 = 9,112.86/x
  3. Step 3: Cross multiply
    20,801.16x = 31,211.87 × 9,112.86
  4. Step 4: Simplify right side
    20,801.16x = 284,429,356.08
  5. Step 5: Solve for x
    x = 284,429,356.08/20,801.16
  6. Step 6: Final answer
    x = 13,673.73

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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.