Home / 20,429.62-28,193.54-11,478.72

Finding the Fourth Proportional to 20,429.62, 28,193.54 and 11,478.72

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Solution

The fourth proportional to 20,429.62, 28,193.54 and 11,478.72 is: 15,841.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.62 : 28,193.54 = 11,478.72 : x
  2. Step 2: Convert to fraction form
    20,429.62/28,193.54 = 11,478.72/x
  3. Step 3: Cross multiply
    20,429.62x = 28,193.54 × 11,478.72
  4. Step 4: Simplify right side
    20,429.62x = 323,625,751.47
  5. Step 5: Solve for x
    x = 323,625,751.47/20,429.62
  6. Step 6: Final answer
    x = 15,841.01

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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.