Home / 20,880.02-28,815.11-11,448.58

Finding the Fourth Proportional to 20,880.02, 28,815.11 and 11,448.58

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Solution

The fourth proportional to 20,880.02, 28,815.11 and 11,448.58 is: 15,799.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.02 : 28,815.11 = 11,448.58 : x
  2. Step 2: Convert to fraction form
    20,880.02/28,815.11 = 11,448.58/x
  3. Step 3: Cross multiply
    20,880.02x = 28,815.11 × 11,448.58
  4. Step 4: Simplify right side
    20,880.02x = 329,892,092.04
  5. Step 5: Solve for x
    x = 329,892,092.04/20,880.02
  6. Step 6: Final answer
    x = 15,799.41

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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.