Home / 30,651.19-42,299.49-21,579.44

Finding the Fourth Proportional to 30,651.19, 42,299.49 and 21,579.44

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Solution

The fourth proportional to 30,651.19, 42,299.49 and 21,579.44 is: 29,780.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,651.19 : 42,299.49 = 21,579.44 : x
  2. Step 2: Convert to fraction form
    30,651.19/42,299.49 = 21,579.44/x
  3. Step 3: Cross multiply
    30,651.19x = 42,299.49 × 21,579.44
  4. Step 4: Simplify right side
    30,651.19x = 912,799,306.49
  5. Step 5: Solve for x
    x = 912,799,306.49/30,651.19
  6. Step 6: Final answer
    x = 29,780.22

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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.