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Finding the Fourth Proportional to 20,565.44, 30,916.48 and 16,894.88

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Solution

The fourth proportional to 20,565.44, 30,916.48 and 16,894.88 is: 25,398.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.44 : 30,916.48 = 16,894.88 : x
  2. Step 2: Convert to fraction form
    20,565.44/30,916.48 = 16,894.88/x
  3. Step 3: Cross multiply
    20,565.44x = 30,916.48 × 16,894.88
  4. Step 4: Simplify right side
    20,565.44x = 522,330,219.62
  5. Step 5: Solve for x
    x = 522,330,219.62/20,565.44
  6. Step 6: Final answer
    x = 25,398.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.