Home / 21,428.93-29,544.48-16,640.77

Finding the Fourth Proportional to 21,428.93, 29,544.48 and 16,640.77

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Solution

The fourth proportional to 21,428.93, 29,544.48 and 16,640.77 is: 22,942.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,428.93 : 29,544.48 = 16,640.77 : x
  2. Step 2: Convert to fraction form
    21,428.93/29,544.48 = 16,640.77/x
  3. Step 3: Cross multiply
    21,428.93x = 29,544.48 × 16,640.77
  4. Step 4: Simplify right side
    21,428.93x = 491,642,877.98
  5. Step 5: Solve for x
    x = 491,642,877.98/21,428.93
  6. Step 6: Final answer
    x = 22,942.95

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Double scale
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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.