Home / 28,431.66-39,236.76-15,858.84

Finding the Fourth Proportional to 28,431.66, 39,236.76 and 15,858.84

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Solution

The fourth proportional to 28,431.66, 39,236.76 and 15,858.84 is: 21,885.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431.66 : 39,236.76 = 15,858.84 : x
  2. Step 2: Convert to fraction form
    28,431.66/39,236.76 = 15,858.84/x
  3. Step 3: Cross multiply
    28,431.66x = 39,236.76 × 15,858.84
  4. Step 4: Simplify right side
    28,431.66x = 622,249,498.96
  5. Step 5: Solve for x
    x = 622,249,498.96/28,431.66
  6. Step 6: Final answer
    x = 21,885.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.