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Finding the Fourth Proportional to 20,402.88, 30,579.71 and 10,536.77

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Solution

The fourth proportional to 20,402.88, 30,579.71 and 10,536.77 is: 15,792.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.88 : 30,579.71 = 10,536.77 : x
  2. Step 2: Convert to fraction form
    20,402.88/30,579.71 = 10,536.77/x
  3. Step 3: Cross multiply
    20,402.88x = 30,579.71 × 10,536.77
  4. Step 4: Simplify right side
    20,402.88x = 322,211,165.35
  5. Step 5: Solve for x
    x = 322,211,165.35/20,402.88
  6. Step 6: Final answer
    x = 15,792.44

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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.