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Finding the Fourth Proportional to 21,795, 30,077.74 and 11,859.64

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Solution

The fourth proportional to 21,795, 30,077.74 and 11,859.64 is: 16,366.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,795 : 30,077.74 = 11,859.64 : x
  2. Step 2: Convert to fraction form
    21,795/30,077.74 = 11,859.64/x
  3. Step 3: Cross multiply
    21,795x = 30,077.74 × 11,859.64
  4. Step 4: Simplify right side
    21,795x = 356,711,168.41
  5. Step 5: Solve for x
    x = 356,711,168.41/21,795
  6. Step 6: Final answer
    x = 16,366.65

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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.