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Finding the Fourth Proportional to 13,812.76, 20,705.27 and 4,445.90

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Solution

The fourth proportional to 13,812.76, 20,705.27 and 4,445.90 is: 6,664.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,812.76 : 20,705.27 = 4,445.90 : x
  2. Step 2: Convert to fraction form
    13,812.76/20,705.27 = 4,445.90/x
  3. Step 3: Cross multiply
    13,812.76x = 20,705.27 × 4,445.90
  4. Step 4: Simplify right side
    13,812.76x = 92,053,434.14
  5. Step 5: Solve for x
    x = 92,053,434.14/13,812.76
  6. Step 6: Final answer
    x = 6,664.38

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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.