Home / 20,539.85-28,345.01-11,108.41

Finding the Fourth Proportional to 20,539.85, 28,345.01 and 11,108.41

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Solution

The fourth proportional to 20,539.85, 28,345.01 and 11,108.41 is: 15,329.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,539.85 : 28,345.01 = 11,108.41 : x
  2. Step 2: Convert to fraction form
    20,539.85/28,345.01 = 11,108.41/x
  3. Step 3: Cross multiply
    20,539.85x = 28,345.01 × 11,108.41
  4. Step 4: Simplify right side
    20,539.85x = 314,867,866.13
  5. Step 5: Solve for x
    x = 314,867,866.13/20,539.85
  6. Step 6: Final answer
    x = 15,329.61

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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.