Home / 20,878.26-28,813.80-11,448.64

Finding the Fourth Proportional to 20,878.26, 28,813.80 and 11,448.64

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Solution

The fourth proportional to 20,878.26, 28,813.80 and 11,448.64 is: 15,800.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.26 : 28,813.80 = 11,448.64 : x
  2. Step 2: Convert to fraction form
    20,878.26/28,813.80 = 11,448.64/x
  3. Step 3: Cross multiply
    20,878.26x = 28,813.80 × 11,448.64
  4. Step 4: Simplify right side
    20,878.26x = 329,878,823.23
  5. Step 5: Solve for x
    x = 329,878,823.23/20,878.26
  6. Step 6: Final answer
    x = 15,800.11

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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.