Home / 28,511.87-39,345.82-15,765.50

Finding the Fourth Proportional to 28,511.87, 39,345.82 and 15,765.50

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Solution

The fourth proportional to 28,511.87, 39,345.82 and 15,765.50 is: 21,756.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,511.87 : 39,345.82 = 15,765.50 : x
  2. Step 2: Convert to fraction form
    28,511.87/39,345.82 = 15,765.50/x
  3. Step 3: Cross multiply
    28,511.87x = 39,345.82 × 15,765.50
  4. Step 4: Simplify right side
    28,511.87x = 620,306,584.16
  5. Step 5: Solve for x
    x = 620,306,584.16/28,511.87
  6. Step 6: Final answer
    x = 21,756.09

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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.