Home / 20,845.96-28,792.68-15,171.72

Finding the Fourth Proportional to 20,845.96, 28,792.68 and 15,171.72

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Solution

The fourth proportional to 20,845.96, 28,792.68 and 15,171.72 is: 20,955.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,845.96 : 28,792.68 = 15,171.72 : x
  2. Step 2: Convert to fraction form
    20,845.96/28,792.68 = 15,171.72/x
  3. Step 3: Cross multiply
    20,845.96x = 28,792.68 × 15,171.72
  4. Step 4: Simplify right side
    20,845.96x = 436,834,479.01
  5. Step 5: Solve for x
    x = 436,834,479.01/20,845.96
  6. Step 6: Final answer
    x = 20,955.35

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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.