Home / 38,431.40-57,647.10-18,748.40

Finding the Fourth Proportional to 38,431.40, 57,647.10 and 18,748.40

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Solution

The fourth proportional to 38,431.40, 57,647.10 and 18,748.40 is: 28,122.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,431.40 : 57,647.10 = 18,748.40 : x
  2. Step 2: Convert to fraction form
    38,431.40/57,647.10 = 18,748.40/x
  3. Step 3: Cross multiply
    38,431.40x = 57,647.10 × 18,748.40
  4. Step 4: Simplify right side
    38,431.40x = 1,080,790,889.64
  5. Step 5: Solve for x
    x = 1,080,790,889.64/38,431.40
  6. Step 6: Final answer
    x = 28,122.60

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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.