Home / 20,847.36-28,769.76-11,415.72

Finding the Fourth Proportional to 20,847.36, 28,769.76 and 11,415.72

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Solution

The fourth proportional to 20,847.36, 28,769.76 and 11,415.72 is: 15,753.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,847.36 : 28,769.76 = 11,415.72 : x
  2. Step 2: Convert to fraction form
    20,847.36/28,769.76 = 11,415.72/x
  3. Step 3: Cross multiply
    20,847.36x = 28,769.76 × 11,415.72
  4. Step 4: Simplify right side
    20,847.36x = 328,427,524.63
  5. Step 5: Solve for x
    x = 328,427,524.63/20,847.36
  6. Step 6: Final answer
    x = 15,753.91

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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.