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Finding the Fourth Proportional to 14,659.80, 21,989.70 and 14,141.40

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Solution

The fourth proportional to 14,659.80, 21,989.70 and 14,141.40 is: 21,212.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,659.80 : 21,989.70 = 14,141.40 : x
  2. Step 2: Convert to fraction form
    14,659.80/21,989.70 = 14,141.40/x
  3. Step 3: Cross multiply
    14,659.80x = 21,989.70 × 14,141.40
  4. Step 4: Simplify right side
    14,659.80x = 310,965,143.58
  5. Step 5: Solve for x
    x = 310,965,143.58/14,659.80
  6. Step 6: Final answer
    x = 21,212.10

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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.