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Finding the Fourth Proportional to 14,785.60, 20,401.44 and 8,817.60

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Solution

The fourth proportional to 14,785.60, 20,401.44 and 8,817.60 is: 12,166.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,785.60 : 20,401.44 = 8,817.60 : x
  2. Step 2: Convert to fraction form
    14,785.60/20,401.44 = 8,817.60/x
  3. Step 3: Cross multiply
    14,785.60x = 20,401.44 × 8,817.60
  4. Step 4: Simplify right side
    14,785.60x = 179,891,737.34
  5. Step 5: Solve for x
    x = 179,891,737.34/14,785.60
  6. Step 6: Final answer
    x = 12,166.68

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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.