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Finding the Fourth Proportional to 21,887.81, 32,800.64 and 16,871.22

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Solution

The fourth proportional to 21,887.81, 32,800.64 and 16,871.22 is: 25,282.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,887.81 : 32,800.64 = 16,871.22 : x
  2. Step 2: Convert to fraction form
    21,887.81/32,800.64 = 16,871.22/x
  3. Step 3: Cross multiply
    21,887.81x = 32,800.64 × 16,871.22
  4. Step 4: Simplify right side
    21,887.81x = 553,386,813.58
  5. Step 5: Solve for x
    x = 553,386,813.58/21,887.81
  6. Step 6: Final answer
    x = 25,282.88

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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.