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Finding the Fourth Proportional to 21,709.80, 32,550.10 and 8,555.40

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Solution

The fourth proportional to 21,709.80, 32,550.10 and 8,555.40 is: 12,827.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,709.80 : 32,550.10 = 8,555.40 : x
  2. Step 2: Convert to fraction form
    21,709.80/32,550.10 = 8,555.40/x
  3. Step 3: Cross multiply
    21,709.80x = 32,550.10 × 8,555.40
  4. Step 4: Simplify right side
    21,709.80x = 278,479,125.54
  5. Step 5: Solve for x
    x = 278,479,125.54/21,709.80
  6. Step 6: Final answer
    x = 12,827.35

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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.