Home / 21,110.90-29,137.05-15,077.48

Finding the Fourth Proportional to 21,110.90, 29,137.05 and 15,077.48

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Solution

The fourth proportional to 21,110.90, 29,137.05 and 15,077.48 is: 20,809.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.90 : 29,137.05 = 15,077.48 : x
  2. Step 2: Convert to fraction form
    21,110.90/29,137.05 = 15,077.48/x
  3. Step 3: Cross multiply
    21,110.90x = 29,137.05 × 15,077.48
  4. Step 4: Simplify right side
    21,110.90x = 439,313,142.95
  5. Step 5: Solve for x
    x = 439,313,142.95/21,110.90
  6. Step 6: Final answer
    x = 20,809.78

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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.