Home / 20,658.12-28,508.12-11,707.32

Finding the Fourth Proportional to 20,658.12, 28,508.12 and 11,707.32

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Solution

The fourth proportional to 20,658.12, 28,508.12 and 11,707.32 is: 16,156.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.12 : 28,508.12 = 11,707.32 : x
  2. Step 2: Convert to fraction form
    20,658.12/28,508.12 = 11,707.32/x
  3. Step 3: Cross multiply
    20,658.12x = 28,508.12 × 11,707.32
  4. Step 4: Simplify right side
    20,658.12x = 333,753,683.44
  5. Step 5: Solve for x
    x = 333,753,683.44/20,658.12
  6. Step 6: Final answer
    x = 16,156.05

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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.