Home / 28,711.02-39,609.96-21,175.44

Finding the Fourth Proportional to 28,711.02, 39,609.96 and 21,175.44

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Solution

The fourth proportional to 28,711.02, 39,609.96 and 21,175.44 is: 29,213.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,711.02 : 39,609.96 = 21,175.44 : x
  2. Step 2: Convert to fraction form
    28,711.02/39,609.96 = 21,175.44/x
  3. Step 3: Cross multiply
    28,711.02x = 39,609.96 × 21,175.44
  4. Step 4: Simplify right side
    28,711.02x = 838,758,331.38
  5. Step 5: Solve for x
    x = 838,758,331.38/28,711.02
  6. Step 6: Final answer
    x = 29,213.81

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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.