Home / 28,511.72-39,345.93-15,765.23

Finding the Fourth Proportional to 28,511.72, 39,345.93 and 15,765.23

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Solution

The fourth proportional to 28,511.72, 39,345.93 and 15,765.23 is: 21,755.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,511.72 : 39,345.93 = 15,765.23 : x
  2. Step 2: Convert to fraction form
    28,511.72/39,345.93 = 15,765.23/x
  3. Step 3: Cross multiply
    28,511.72x = 39,345.93 × 15,765.23
  4. Step 4: Simplify right side
    28,511.72x = 620,297,636.01
  5. Step 5: Solve for x
    x = 620,297,636.01/28,511.72
  6. Step 6: Final answer
    x = 21,755.88

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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.