Home / 15,849.45-21,871.06-8,677.80

Finding the Fourth Proportional to 15,849.45, 21,871.06 and 8,677.80

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Solution

The fourth proportional to 15,849.45, 21,871.06 and 8,677.80 is: 11,974.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,849.45 : 21,871.06 = 8,677.80 : x
  2. Step 2: Convert to fraction form
    15,849.45/21,871.06 = 8,677.80/x
  3. Step 3: Cross multiply
    15,849.45x = 21,871.06 × 8,677.80
  4. Step 4: Simplify right side
    15,849.45x = 189,792,619.32
  5. Step 5: Solve for x
    x = 189,792,619.32/15,849.45
  6. Step 6: Final answer
    x = 11,974.72

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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.