Home / 15,847.89-21,869.90-8,677.73

Finding the Fourth Proportional to 15,847.89, 21,869.90 and 8,677.73

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Solution

The fourth proportional to 15,847.89, 21,869.90 and 8,677.73 is: 11,975.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,847.89 : 21,869.90 = 8,677.73 : x
  2. Step 2: Convert to fraction form
    15,847.89/21,869.90 = 8,677.73/x
  3. Step 3: Cross multiply
    15,847.89x = 21,869.90 × 8,677.73
  4. Step 4: Simplify right side
    15,847.89x = 189,781,131.15
  5. Step 5: Solve for x
    x = 189,781,131.15/15,847.89
  6. Step 6: Final answer
    x = 11,975.17

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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.