Home / 21,012.77-29,001.92-12,519.87

Finding the Fourth Proportional to 21,012.77, 29,001.92 and 12,519.87

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Solution

The fourth proportional to 21,012.77, 29,001.92 and 12,519.87 is: 17,279.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.77 : 29,001.92 = 12,519.87 : x
  2. Step 2: Convert to fraction form
    21,012.77/29,001.92 = 12,519.87/x
  3. Step 3: Cross multiply
    21,012.77x = 29,001.92 × 12,519.87
  4. Step 4: Simplify right side
    21,012.77x = 363,100,202.43
  5. Step 5: Solve for x
    x = 363,100,202.43/21,012.77
  6. Step 6: Final answer
    x = 17,279.98

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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.