Home / 20,880.12-28,814.88-11,448.60

Finding the Fourth Proportional to 20,880.12, 28,814.88 and 11,448.60

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Solution

The fourth proportional to 20,880.12, 28,814.88 and 11,448.60 is: 15,799.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.12 : 28,814.88 = 11,448.60 : x
  2. Step 2: Convert to fraction form
    20,880.12/28,814.88 = 11,448.60/x
  3. Step 3: Cross multiply
    20,880.12x = 28,814.88 × 11,448.60
  4. Step 4: Simplify right side
    20,880.12x = 329,890,035.17
  5. Step 5: Solve for x
    x = 329,890,035.17/20,880.12
  6. Step 6: Final answer
    x = 15,799.24

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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.