Home / 28,511.12-39,344.54-15,764.09

Finding the Fourth Proportional to 28,511.12, 39,344.54 and 15,764.09

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Solution

The fourth proportional to 28,511.12, 39,344.54 and 15,764.09 is: 21,753.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,511.12 : 39,344.54 = 15,764.09 : x
  2. Step 2: Convert to fraction form
    28,511.12/39,344.54 = 15,764.09/x
  3. Step 3: Cross multiply
    28,511.12x = 39,344.54 × 15,764.09
  4. Step 4: Simplify right side
    28,511.12x = 620,230,594.03
  5. Step 5: Solve for x
    x = 620,230,594.03/28,511.12
  6. Step 6: Final answer
    x = 21,753.99

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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.