Home / 20,880.14-28,814.46-11,448.70

Finding the Fourth Proportional to 20,880.14, 28,814.46 and 11,448.70

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Solution

The fourth proportional to 20,880.14, 28,814.46 and 11,448.70 is: 15,799.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.14 : 28,814.46 = 11,448.70 : x
  2. Step 2: Convert to fraction form
    20,880.14/28,814.46 = 11,448.70/x
  3. Step 3: Cross multiply
    20,880.14x = 28,814.46 × 11,448.70
  4. Step 4: Simplify right side
    20,880.14x = 329,888,108.20
  5. Step 5: Solve for x
    x = 329,888,108.20/20,880.14
  6. Step 6: Final answer
    x = 15,799.13

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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.