Home / 20,211.99-27,890.85-11,261.61

Finding the Fourth Proportional to 20,211.99, 27,890.85 and 11,261.61

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Solution

The fourth proportional to 20,211.99, 27,890.85 and 11,261.61 is: 15,540.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,211.99 : 27,890.85 = 11,261.61 : x
  2. Step 2: Convert to fraction form
    20,211.99/27,890.85 = 11,261.61/x
  3. Step 3: Cross multiply
    20,211.99x = 27,890.85 × 11,261.61
  4. Step 4: Simplify right side
    20,211.99x = 314,095,875.27
  5. Step 5: Solve for x
    x = 314,095,875.27/20,211.99
  6. Step 6: Final answer
    x = 15,540.08

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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.