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Finding the Fourth Proportional to 13,997.88, 20,894.42 and 12,337.18

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Solution

The fourth proportional to 13,997.88, 20,894.42 and 12,337.18 is: 18,415.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,997.88 : 20,894.42 = 12,337.18 : x
  2. Step 2: Convert to fraction form
    13,997.88/20,894.42 = 12,337.18/x
  3. Step 3: Cross multiply
    13,997.88x = 20,894.42 × 12,337.18
  4. Step 4: Simplify right side
    13,997.88x = 257,778,199.14
  5. Step 5: Solve for x
    x = 257,778,199.14/13,997.88
  6. Step 6: Final answer
    x = 18,415.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.