Home / 20,924.16-28,880.82-12,961.86

Finding the Fourth Proportional to 20,924.16, 28,880.82 and 12,961.86

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Solution

The fourth proportional to 20,924.16, 28,880.82 and 12,961.86 is: 17,890.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,924.16 : 28,880.82 = 12,961.86 : x
  2. Step 2: Convert to fraction form
    20,924.16/28,880.82 = 12,961.86/x
  3. Step 3: Cross multiply
    20,924.16x = 28,880.82 × 12,961.86
  4. Step 4: Simplify right side
    20,924.16x = 374,349,145.53
  5. Step 5: Solve for x
    x = 374,349,145.53/20,924.16
  6. Step 6: Final answer
    x = 17,890.76

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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.