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Finding the Fourth Proportional to 21,900.80, 32,881.62 and 15,221.54

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Solution

The fourth proportional to 21,900.80, 32,881.62 and 15,221.54 is: 22,853.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,900.80 : 32,881.62 = 15,221.54 : x
  2. Step 2: Convert to fraction form
    21,900.80/32,881.62 = 15,221.54/x
  3. Step 3: Cross multiply
    21,900.80x = 32,881.62 × 15,221.54
  4. Step 4: Simplify right side
    21,900.80x = 500,508,894.09
  5. Step 5: Solve for x
    x = 500,508,894.09/21,900.80
  6. Step 6: Final answer
    x = 22,853.45

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1.5x scale

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.