Home / 15,685.14-21,645.14-8,611.40

Finding the Fourth Proportional to 15,685.14, 21,645.14 and 8,611.40

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Solution

The fourth proportional to 15,685.14, 21,645.14 and 8,611.40 is: 11,883.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,685.14 : 21,645.14 = 8,611.40 : x
  2. Step 2: Convert to fraction form
    15,685.14/21,645.14 = 8,611.40/x
  3. Step 3: Cross multiply
    15,685.14x = 21,645.14 × 8,611.40
  4. Step 4: Simplify right side
    15,685.14x = 186,394,958.60
  5. Step 5: Solve for x
    x = 186,394,958.60/15,685.14
  6. Step 6: Final answer
    x = 11,883.54

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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.