Home / 21,905.84-30,222.78-12,472.40

Finding the Fourth Proportional to 21,905.84, 30,222.78 and 12,472.40

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Solution

The fourth proportional to 21,905.84, 30,222.78 and 12,472.40 is: 17,207.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,905.84 : 30,222.78 = 12,472.40 : x
  2. Step 2: Convert to fraction form
    21,905.84/30,222.78 = 12,472.40/x
  3. Step 3: Cross multiply
    21,905.84x = 30,222.78 × 12,472.40
  4. Step 4: Simplify right side
    21,905.84x = 376,950,601.27
  5. Step 5: Solve for x
    x = 376,950,601.27/21,905.84
  6. Step 6: Final answer
    x = 17,207.77

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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.