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Finding the Fourth Proportional to 20,924.74, 28,876.22 and 11,364.64

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Solution

The fourth proportional to 20,924.74, 28,876.22 and 11,364.64 is: 15,683.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,924.74 : 28,876.22 = 11,364.64 : x
  2. Step 2: Convert to fraction form
    20,924.74/28,876.22 = 11,364.64/x
  3. Step 3: Cross multiply
    20,924.74x = 28,876.22 × 11,364.64
  4. Step 4: Simplify right side
    20,924.74x = 328,167,844.86
  5. Step 5: Solve for x
    x = 328,167,844.86/20,924.74
  6. Step 6: Final answer
    x = 15,683.25

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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.