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Finding the Fourth Proportional to 35,981.82, 53,981.88 and 12,607.68

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Solution

The fourth proportional to 35,981.82, 53,981.88 and 12,607.68 is: 18,914.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,981.82 : 53,981.88 = 12,607.68 : x
  2. Step 2: Convert to fraction form
    35,981.82/53,981.88 = 12,607.68/x
  3. Step 3: Cross multiply
    35,981.82x = 53,981.88 × 12,607.68
  4. Step 4: Simplify right side
    35,981.82x = 680,586,268.84
  5. Step 5: Solve for x
    x = 680,586,268.84/35,981.82
  6. Step 6: Final answer
    x = 18,914.73

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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.