Home / 21,022.70-28,981.18-16,538.66

Finding the Fourth Proportional to 21,022.70, 28,981.18 and 16,538.66

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Solution

The fourth proportional to 21,022.70, 28,981.18 and 16,538.66 is: 22,799.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022.70 : 28,981.18 = 16,538.66 : x
  2. Step 2: Convert to fraction form
    21,022.70/28,981.18 = 16,538.66/x
  3. Step 3: Cross multiply
    21,022.70x = 28,981.18 × 16,538.66
  4. Step 4: Simplify right side
    21,022.70x = 479,309,773.84
  5. Step 5: Solve for x
    x = 479,309,773.84/21,022.70
  6. Step 6: Final answer
    x = 22,799.64

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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.