Home / 21,037.80-29,231.39-20,818.44

Finding the Fourth Proportional to 21,037.80, 29,231.39 and 20,818.44

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Solution

The fourth proportional to 21,037.80, 29,231.39 and 20,818.44 is: 28,926.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,037.80 : 29,231.39 = 20,818.44 : x
  2. Step 2: Convert to fraction form
    21,037.80/29,231.39 = 20,818.44/x
  3. Step 3: Cross multiply
    21,037.80x = 29,231.39 × 20,818.44
  4. Step 4: Simplify right side
    21,037.80x = 608,551,938.83
  5. Step 5: Solve for x
    x = 608,551,938.83/21,037.80
  6. Step 6: Final answer
    x = 28,926.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.