Home / 20,877.64-28,812.96-11,448.04

Finding the Fourth Proportional to 20,877.64, 28,812.96 and 11,448.04

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Solution

The fourth proportional to 20,877.64, 28,812.96 and 11,448.04 is: 15,799.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.64 : 28,812.96 = 11,448.04 : x
  2. Step 2: Convert to fraction form
    20,877.64/28,812.96 = 11,448.04/x
  3. Step 3: Cross multiply
    20,877.64x = 28,812.96 × 11,448.04
  4. Step 4: Simplify right side
    20,877.64x = 329,851,918.60
  5. Step 5: Solve for x
    x = 329,851,918.60/20,877.64
  6. Step 6: Final answer
    x = 15,799.29

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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.