Home / 21,375.77-29,508.93-15,015.87

Finding the Fourth Proportional to 21,375.77, 29,508.93 and 15,015.87

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Solution

The fourth proportional to 21,375.77, 29,508.93 and 15,015.87 is: 20,729.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,375.77 : 29,508.93 = 15,015.87 : x
  2. Step 2: Convert to fraction form
    21,375.77/29,508.93 = 15,015.87/x
  3. Step 3: Cross multiply
    21,375.77x = 29,508.93 × 15,015.87
  4. Step 4: Simplify right side
    21,375.77x = 443,102,256.72
  5. Step 5: Solve for x
    x = 443,102,256.72/21,375.77
  6. Step 6: Final answer
    x = 20,729.19

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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.