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Finding the Fourth Proportional to 20,402.76, 30,579.52 and 10,536.64

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Solution

The fourth proportional to 20,402.76, 30,579.52 and 10,536.64 is: 15,792.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.76 : 30,579.52 = 10,536.64 : x
  2. Step 2: Convert to fraction form
    20,402.76/30,579.52 = 10,536.64/x
  3. Step 3: Cross multiply
    20,402.76x = 30,579.52 × 10,536.64
  4. Step 4: Simplify right side
    20,402.76x = 322,205,393.61
  5. Step 5: Solve for x
    x = 322,205,393.61/20,402.76
  6. Step 6: Final answer
    x = 15,792.25

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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.