Home / 20,174.40-30,276.48-10,188.72

Finding the Fourth Proportional to 20,174.40, 30,276.48 and 10,188.72

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Solution

The fourth proportional to 20,174.40, 30,276.48 and 10,188.72 is: 15,290.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,174.40 : 30,276.48 = 10,188.72 : x
  2. Step 2: Convert to fraction form
    20,174.40/30,276.48 = 10,188.72/x
  3. Step 3: Cross multiply
    20,174.40x = 30,276.48 × 10,188.72
  4. Step 4: Simplify right side
    20,174.40x = 308,478,577.31
  5. Step 5: Solve for x
    x = 308,478,577.31/20,174.40
  6. Step 6: Final answer
    x = 15,290.59

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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.