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Finding the Fourth Proportional to 14,455.60, 21,640.20 and 13,601.20

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Solution

The fourth proportional to 14,455.60, 21,640.20 and 13,601.20 is: 20,361.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,455.60 : 21,640.20 = 13,601.20 : x
  2. Step 2: Convert to fraction form
    14,455.60/21,640.20 = 13,601.20/x
  3. Step 3: Cross multiply
    14,455.60x = 21,640.20 × 13,601.20
  4. Step 4: Simplify right side
    14,455.60x = 294,332,688.24
  5. Step 5: Solve for x
    x = 294,332,688.24/14,455.60
  6. Step 6: Final answer
    x = 20,361.15

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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.