Home / 22,865.76-31,556.88-21,078.90

Finding the Fourth Proportional to 22,865.76, 31,556.88 and 21,078.90

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Solution

The fourth proportional to 22,865.76, 31,556.88 and 21,078.90 is: 29,090.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,865.76 : 31,556.88 = 21,078.90 : x
  2. Step 2: Convert to fraction form
    22,865.76/31,556.88 = 21,078.90/x
  3. Step 3: Cross multiply
    22,865.76x = 31,556.88 × 21,078.90
  4. Step 4: Simplify right side
    22,865.76x = 665,184,317.83
  5. Step 5: Solve for x
    x = 665,184,317.83/22,865.76
  6. Step 6: Final answer
    x = 29,090.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.