Home / 20,846.40-28,768.50-11,415.12

Finding the Fourth Proportional to 20,846.40, 28,768.50 and 11,415.12

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Solution

The fourth proportional to 20,846.40, 28,768.50 and 11,415.12 is: 15,753.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,846.40 : 28,768.50 = 11,415.12 : x
  2. Step 2: Convert to fraction form
    20,846.40/28,768.50 = 11,415.12/x
  3. Step 3: Cross multiply
    20,846.40x = 28,768.50 × 11,415.12
  4. Step 4: Simplify right side
    20,846.40x = 328,395,879.72
  5. Step 5: Solve for x
    x = 328,395,879.72/20,846.40
  6. Step 6: Final answer
    x = 15,753.12

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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.