Home / 28,631.76-39,776.38-28,375.44

Finding the Fourth Proportional to 28,631.76, 39,776.38 and 28,375.44

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Solution

The fourth proportional to 28,631.76, 39,776.38 and 28,375.44 is: 39,420.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,631.76 : 39,776.38 = 28,375.44 : x
  2. Step 2: Convert to fraction form
    28,631.76/39,776.38 = 28,375.44/x
  3. Step 3: Cross multiply
    28,631.76x = 39,776.38 × 28,375.44
  4. Step 4: Simplify right side
    28,631.76x = 1,128,672,284.11
  5. Step 5: Solve for x
    x = 1,128,672,284.11/28,631.76
  6. Step 6: Final answer
    x = 39,420.29

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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.