Home / 20,358.17-28,093.70-11,406.21

Finding the Fourth Proportional to 20,358.17, 28,093.70 and 11,406.21

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Solution

The fourth proportional to 20,358.17, 28,093.70 and 11,406.21 is: 15,740.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,358.17 : 28,093.70 = 11,406.21 : x
  2. Step 2: Convert to fraction form
    20,358.17/28,093.70 = 11,406.21/x
  3. Step 3: Cross multiply
    20,358.17x = 28,093.70 × 11,406.21
  4. Step 4: Simplify right side
    20,358.17x = 320,442,641.88
  5. Step 5: Solve for x
    x = 320,442,641.88/20,358.17
  6. Step 6: Final answer
    x = 15,740.25

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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.