Home / 43,931-65,886.60-20,215.78

Finding the Fourth Proportional to 43,931, 65,886.60 and 20,215.78

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Solution

The fourth proportional to 43,931, 65,886.60 and 20,215.78 is: 30,319.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,931 : 65,886.60 = 20,215.78 : x
  2. Step 2: Convert to fraction form
    43,931/65,886.60 = 20,215.78/x
  3. Step 3: Cross multiply
    43,931x = 65,886.60 × 20,215.78
  4. Step 4: Simplify right side
    43,931x = 1,331,949,010.55
  5. Step 5: Solve for x
    x = 1,331,949,010.55/43,931
  6. Step 6: Final answer
    x = 30,319.11

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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.