Home / 20,847.34-28,768.26-11,415.70

Finding the Fourth Proportional to 20,847.34, 28,768.26 and 11,415.70

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Solution

The fourth proportional to 20,847.34, 28,768.26 and 11,415.70 is: 15,753.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,847.34 : 28,768.26 = 11,415.70 : x
  2. Step 2: Convert to fraction form
    20,847.34/28,768.26 = 11,415.70/x
  3. Step 3: Cross multiply
    20,847.34x = 28,768.26 × 11,415.70
  4. Step 4: Simplify right side
    20,847.34x = 328,409,825.68
  5. Step 5: Solve for x
    x = 328,409,825.68/20,847.34
  6. Step 6: Final answer
    x = 15,753.08

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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.