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Finding the Fourth Proportional to 20,498.77, 30,748.19 and 5,707.68

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Solution

The fourth proportional to 20,498.77, 30,748.19 and 5,707.68 is: 8,561.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,498.77 : 30,748.19 = 5,707.68 : x
  2. Step 2: Convert to fraction form
    20,498.77/30,748.19 = 5,707.68/x
  3. Step 3: Cross multiply
    20,498.77x = 30,748.19 × 5,707.68
  4. Step 4: Simplify right side
    20,498.77x = 175,500,858.21
  5. Step 5: Solve for x
    x = 175,500,858.21/20,498.77
  6. Step 6: Final answer
    x = 8,561.53

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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.