Home / 21,213.71-31,665.48-19,671.83

Finding the Fourth Proportional to 21,213.71, 31,665.48 and 19,671.83

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Solution

The fourth proportional to 21,213.71, 31,665.48 and 19,671.83 is: 29,363.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,213.71 : 31,665.48 = 19,671.83 : x
  2. Step 2: Convert to fraction form
    21,213.71/31,665.48 = 19,671.83/x
  3. Step 3: Cross multiply
    21,213.71x = 31,665.48 × 19,671.83
  4. Step 4: Simplify right side
    21,213.71x = 622,917,988.61
  5. Step 5: Solve for x
    x = 622,917,988.61/21,213.71
  6. Step 6: Final answer
    x = 29,363.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.