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Finding the Fourth Proportional to 21,908.81, 30,248.01 and 16,863.54

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Solution

The fourth proportional to 21,908.81, 30,248.01 and 16,863.54 is: 23,282.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,908.81 : 30,248.01 = 16,863.54 : x
  2. Step 2: Convert to fraction form
    21,908.81/30,248.01 = 16,863.54/x
  3. Step 3: Cross multiply
    21,908.81x = 30,248.01 × 16,863.54
  4. Step 4: Simplify right side
    21,908.81x = 510,088,526.56
  5. Step 5: Solve for x
    x = 510,088,526.56/21,908.81
  6. Step 6: Final answer
    x = 23,282.35

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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.