Home / 20,572.30-28,388.13-11,620.67

Finding the Fourth Proportional to 20,572.30, 28,388.13 and 11,620.67

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Solution

The fourth proportional to 20,572.30, 28,388.13 and 11,620.67 is: 16,035.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.30 : 28,388.13 = 11,620.67 : x
  2. Step 2: Convert to fraction form
    20,572.30/28,388.13 = 11,620.67/x
  3. Step 3: Cross multiply
    20,572.30x = 28,388.13 × 11,620.67
  4. Step 4: Simplify right side
    20,572.30x = 329,889,090.65
  5. Step 5: Solve for x
    x = 329,889,090.65/20,572.30
  6. Step 6: Final answer
    x = 16,035.60

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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.