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Finding the Fourth Proportional to 20,488.29, 30,739.91 and 8,645.01

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Solution

The fourth proportional to 20,488.29, 30,739.91 and 8,645.01 is: 12,970.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.29 : 30,739.91 = 8,645.01 : x
  2. Step 2: Convert to fraction form
    20,488.29/30,739.91 = 8,645.01/x
  3. Step 3: Cross multiply
    20,488.29x = 30,739.91 × 8,645.01
  4. Step 4: Simplify right side
    20,488.29x = 265,746,786.12
  5. Step 5: Solve for x
    x = 265,746,786.12/20,488.29
  6. Step 6: Final answer
    x = 12,970.67

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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.