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Finding the Fourth Proportional to 13,892.15, 20,823.65 and 9,994.43

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Solution

The fourth proportional to 13,892.15, 20,823.65 and 9,994.43 is: 14,981.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,892.15 : 20,823.65 = 9,994.43 : x
  2. Step 2: Convert to fraction form
    13,892.15/20,823.65 = 9,994.43/x
  3. Step 3: Cross multiply
    13,892.15x = 20,823.65 × 9,994.43
  4. Step 4: Simplify right side
    13,892.15x = 208,120,462.30
  5. Step 5: Solve for x
    x = 208,120,462.30/13,892.15
  6. Step 6: Final answer
    x = 14,981.16

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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.