Home / 18,748.40-28,090.20-12,171.20

Finding the Fourth Proportional to 18,748.40, 28,090.20 and 12,171.20

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Solution

The fourth proportional to 18,748.40, 28,090.20 and 12,171.20 is: 18,235.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,748.40 : 28,090.20 = 12,171.20 : x
  2. Step 2: Convert to fraction form
    18,748.40/28,090.20 = 12,171.20/x
  3. Step 3: Cross multiply
    18,748.40x = 28,090.20 × 12,171.20
  4. Step 4: Simplify right side
    18,748.40x = 341,891,442.24
  5. Step 5: Solve for x
    x = 341,891,442.24/18,748.40
  6. Step 6: Final answer
    x = 18,235.77

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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.