Home / 22,981.84-31,712.70-12,908

Finding the Fourth Proportional to 22,981.84, 31,712.70 and 12,908

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Solution

The fourth proportional to 22,981.84, 31,712.70 and 12,908 is: 17,811.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,981.84 : 31,712.70 = 12,908 : x
  2. Step 2: Convert to fraction form
    22,981.84/31,712.70 = 12,908/x
  3. Step 3: Cross multiply
    22,981.84x = 31,712.70 × 12,908
  4. Step 4: Simplify right side
    22,981.84x = 409,347,531.60
  5. Step 5: Solve for x
    x = 409,347,531.60/22,981.84
  6. Step 6: Final answer
    x = 17,811.78

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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.