Home / 20,281.62-27,988.70-11,329.47

Finding the Fourth Proportional to 20,281.62, 27,988.70 and 11,329.47

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Solution

The fourth proportional to 20,281.62, 27,988.70 and 11,329.47 is: 15,634.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.62 : 27,988.70 = 11,329.47 : x
  2. Step 2: Convert to fraction form
    20,281.62/27,988.70 = 11,329.47/x
  3. Step 3: Cross multiply
    20,281.62x = 27,988.70 × 11,329.47
  4. Step 4: Simplify right side
    20,281.62x = 317,096,940.40
  5. Step 5: Solve for x
    x = 317,096,940.40/20,281.62
  6. Step 6: Final answer
    x = 15,634.70

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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.