Home / 28,231.64-42,347.51-8,515.84

Finding the Fourth Proportional to 28,231.64, 42,347.51 and 8,515.84

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Solution

The fourth proportional to 28,231.64, 42,347.51 and 8,515.84 is: 12,773.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,231.64 : 42,347.51 = 8,515.84 : x
  2. Step 2: Convert to fraction form
    28,231.64/42,347.51 = 8,515.84/x
  3. Step 3: Cross multiply
    28,231.64x = 42,347.51 × 8,515.84
  4. Step 4: Simplify right side
    28,231.64x = 360,624,619.56
  5. Step 5: Solve for x
    x = 360,624,619.56/28,231.64
  6. Step 6: Final answer
    x = 12,773.78

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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.