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Finding the Fourth Proportional to 20,480.58, 30,689.58 and 13,792.32

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Solution

The fourth proportional to 20,480.58, 30,689.58 and 13,792.32 is: 20,667.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.58 : 30,689.58 = 13,792.32 : x
  2. Step 2: Convert to fraction form
    20,480.58/30,689.58 = 13,792.32/x
  3. Step 3: Cross multiply
    20,480.58x = 30,689.58 × 13,792.32
  4. Step 4: Simplify right side
    20,480.58x = 423,280,508.03
  5. Step 5: Solve for x
    x = 423,280,508.03/20,480.58
  6. Step 6: Final answer
    x = 20,667.41

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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.