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Finding the Fourth Proportional to 13,622.80, 18,800.02 and 7,654.45

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Solution

The fourth proportional to 13,622.80, 18,800.02 and 7,654.45 is: 10,563.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,622.80 : 18,800.02 = 7,654.45 : x
  2. Step 2: Convert to fraction form
    13,622.80/18,800.02 = 7,654.45/x
  3. Step 3: Cross multiply
    13,622.80x = 18,800.02 × 7,654.45
  4. Step 4: Simplify right side
    13,622.80x = 143,903,793.95
  5. Step 5: Solve for x
    x = 143,903,793.95/13,622.80
  6. Step 6: Final answer
    x = 10,563.45

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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.