Home / 21,203.70-31,805.55-19,389.30

Finding the Fourth Proportional to 21,203.70, 31,805.55 and 19,389.30

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Solution

The fourth proportional to 21,203.70, 31,805.55 and 19,389.30 is: 29,083.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,203.70 : 31,805.55 = 19,389.30 : x
  2. Step 2: Convert to fraction form
    21,203.70/31,805.55 = 19,389.30/x
  3. Step 3: Cross multiply
    21,203.70x = 31,805.55 × 19,389.30
  4. Step 4: Simplify right side
    21,203.70x = 616,687,350.62
  5. Step 5: Solve for x
    x = 616,687,350.62/21,203.70
  6. Step 6: Final answer
    x = 29,083.95

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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.