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Finding the Fourth Proportional to 18,859.20, 28,240.20 and 14,971.20

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Solution

The fourth proportional to 18,859.20, 28,240.20 and 14,971.20 is: 22,418.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,859.20 : 28,240.20 = 14,971.20 : x
  2. Step 2: Convert to fraction form
    18,859.20/28,240.20 = 14,971.20/x
  3. Step 3: Cross multiply
    18,859.20x = 28,240.20 × 14,971.20
  4. Step 4: Simplify right side
    18,859.20x = 422,789,682.24
  5. Step 5: Solve for x
    x = 422,789,682.24/18,859.20
  6. Step 6: Final answer
    x = 22,418.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.