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Finding the Fourth Proportional to 18,117.84, 24,994.12 and 12,815.58

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Solution

The fourth proportional to 18,117.84, 24,994.12 and 12,815.58 is: 17,679.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,117.84 : 24,994.12 = 12,815.58 : x
  2. Step 2: Convert to fraction form
    18,117.84/24,994.12 = 12,815.58/x
  3. Step 3: Cross multiply
    18,117.84x = 24,994.12 × 12,815.58
  4. Step 4: Simplify right side
    18,117.84x = 320,314,230.11
  5. Step 5: Solve for x
    x = 320,314,230.11/18,117.84
  6. Step 6: Final answer
    x = 17,679.49

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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.