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Finding the Fourth Proportional to 20,616.52, 28,450.02 and 12,659.08

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Solution

The fourth proportional to 20,616.52, 28,450.02 and 12,659.08 is: 17,469.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,616.52 : 28,450.02 = 12,659.08 : x
  2. Step 2: Convert to fraction form
    20,616.52/28,450.02 = 12,659.08/x
  3. Step 3: Cross multiply
    20,616.52x = 28,450.02 × 12,659.08
  4. Step 4: Simplify right side
    20,616.52x = 360,151,079.18
  5. Step 5: Solve for x
    x = 360,151,079.18/20,616.52
  6. Step 6: Final answer
    x = 17,469.05

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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.