Home / 20,540.10-28,343.16-15,165.36

Finding the Fourth Proportional to 20,540.10, 28,343.16 and 15,165.36

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Solution

The fourth proportional to 20,540.10, 28,343.16 and 15,165.36 is: 20,926.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.10 : 28,343.16 = 15,165.36 : x
  2. Step 2: Convert to fraction form
    20,540.10/28,343.16 = 15,165.36/x
  3. Step 3: Cross multiply
    20,540.10x = 28,343.16 × 15,165.36
  4. Step 4: Simplify right side
    20,540.10x = 429,834,224.94
  5. Step 5: Solve for x
    x = 429,834,224.94/20,540.10
  6. Step 6: Final answer
    x = 20,926.59

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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.