Home / 20,847.10-28,768.95-11,415.58

Finding the Fourth Proportional to 20,847.10, 28,768.95 and 11,415.58

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Solution

The fourth proportional to 20,847.10, 28,768.95 and 11,415.58 is: 15,753.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,847.10 : 28,768.95 = 11,415.58 : x
  2. Step 2: Convert to fraction form
    20,847.10/28,768.95 = 11,415.58/x
  3. Step 3: Cross multiply
    20,847.10x = 28,768.95 × 11,415.58
  4. Step 4: Simplify right side
    20,847.10x = 328,414,250.24
  5. Step 5: Solve for x
    x = 328,414,250.24/20,847.10
  6. Step 6: Final answer
    x = 15,753.47

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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.