Home / 20,899.12-28,840.80-11,468.20

Finding the Fourth Proportional to 20,899.12, 28,840.80 and 11,468.20

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Solution

The fourth proportional to 20,899.12, 28,840.80 and 11,468.20 is: 15,826.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.12 : 28,840.80 = 11,468.20 : x
  2. Step 2: Convert to fraction form
    20,899.12/28,840.80 = 11,468.20/x
  3. Step 3: Cross multiply
    20,899.12x = 28,840.80 × 11,468.20
  4. Step 4: Simplify right side
    20,899.12x = 330,752,062.56
  5. Step 5: Solve for x
    x = 330,752,062.56/20,899.12
  6. Step 6: Final answer
    x = 15,826.12

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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.