Home / 21,987.45-30,341.18-14,028.80

Finding the Fourth Proportional to 21,987.45, 30,341.18 and 14,028.80

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Solution

The fourth proportional to 21,987.45, 30,341.18 and 14,028.80 is: 19,358.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,987.45 : 30,341.18 = 14,028.80 : x
  2. Step 2: Convert to fraction form
    21,987.45/30,341.18 = 14,028.80/x
  3. Step 3: Cross multiply
    21,987.45x = 30,341.18 × 14,028.80
  4. Step 4: Simplify right side
    21,987.45x = 425,650,229.35
  5. Step 5: Solve for x
    x = 425,650,229.35/21,987.45
  6. Step 6: Final answer
    x = 19,358.78

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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.