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Finding the Fourth Proportional to 12,902.80, 19,354.20 and 9,622.30

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Solution

The fourth proportional to 12,902.80, 19,354.20 and 9,622.30 is: 14,433.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,902.80 : 19,354.20 = 9,622.30 : x
  2. Step 2: Convert to fraction form
    12,902.80/19,354.20 = 9,622.30/x
  3. Step 3: Cross multiply
    12,902.80x = 19,354.20 × 9,622.30
  4. Step 4: Simplify right side
    12,902.80x = 186,231,918.66
  5. Step 5: Solve for x
    x = 186,231,918.66/12,902.80
  6. Step 6: Final answer
    x = 14,433.45

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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.