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Finding the Fourth Proportional to 25,699.80, 38,520.90 and 10,906.20

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Solution

The fourth proportional to 25,699.80, 38,520.90 and 10,906.20 is: 16,347.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,699.80 : 38,520.90 = 10,906.20 : x
  2. Step 2: Convert to fraction form
    25,699.80/38,520.90 = 10,906.20/x
  3. Step 3: Cross multiply
    25,699.80x = 38,520.90 × 10,906.20
  4. Step 4: Simplify right side
    25,699.80x = 420,116,639.58
  5. Step 5: Solve for x
    x = 420,116,639.58/25,699.80
  6. Step 6: Final answer
    x = 16,347.08

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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.