Home / 20,287.08-28,031.94-15,611.76

Finding the Fourth Proportional to 20,287.08, 28,031.94 and 15,611.76

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Solution

The fourth proportional to 20,287.08, 28,031.94 and 15,611.76 is: 21,571.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,287.08 : 28,031.94 = 15,611.76 : x
  2. Step 2: Convert to fraction form
    20,287.08/28,031.94 = 15,611.76/x
  3. Step 3: Cross multiply
    20,287.08x = 28,031.94 × 15,611.76
  4. Step 4: Simplify right side
    20,287.08x = 437,627,919.61
  5. Step 5: Solve for x
    x = 437,627,919.61/20,287.08
  6. Step 6: Final answer
    x = 21,571.76

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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.