Home / 20,878.36-28,640.50-19,748.48

Finding the Fourth Proportional to 20,878.36, 28,640.50 and 19,748.48

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Solution

The fourth proportional to 20,878.36, 28,640.50 and 19,748.48 is: 27,090.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.36 : 28,640.50 = 19,748.48 : x
  2. Step 2: Convert to fraction form
    20,878.36/28,640.50 = 19,748.48/x
  3. Step 3: Cross multiply
    20,878.36x = 28,640.50 × 19,748.48
  4. Step 4: Simplify right side
    20,878.36x = 565,606,341.44
  5. Step 5: Solve for x
    x = 565,606,341.44/20,878.36
  6. Step 6: Final answer
    x = 27,090.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.