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Finding the Fourth Proportional to 20,604.51, 28,401.03 and 13,887.99

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Solution

The fourth proportional to 20,604.51, 28,401.03 and 13,887.99 is: 19,143.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,604.51 : 28,401.03 = 13,887.99 : x
  2. Step 2: Convert to fraction form
    20,604.51/28,401.03 = 13,887.99/x
  3. Step 3: Cross multiply
    20,604.51x = 28,401.03 × 13,887.99
  4. Step 4: Simplify right side
    20,604.51x = 394,433,220.63
  5. Step 5: Solve for x
    x = 394,433,220.63/20,604.51
  6. Step 6: Final answer
    x = 19,143.05

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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.