Home / 15,685.68-21,646.08-8,611.92

Finding the Fourth Proportional to 15,685.68, 21,646.08 and 8,611.92

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Solution

The fourth proportional to 15,685.68, 21,646.08 and 8,611.92 is: 11,884.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,685.68 : 21,646.08 = 8,611.92 : x
  2. Step 2: Convert to fraction form
    15,685.68/21,646.08 = 8,611.92/x
  3. Step 3: Cross multiply
    15,685.68x = 21,646.08 × 8,611.92
  4. Step 4: Simplify right side
    15,685.68x = 186,414,309.27
  5. Step 5: Solve for x
    x = 186,414,309.27/15,685.68
  6. Step 6: Final answer
    x = 11,884.36

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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.