Home / 28,487.42-39,313.26-15,912.20

Finding the Fourth Proportional to 28,487.42, 39,313.26 and 15,912.20

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Solution

The fourth proportional to 28,487.42, 39,313.26 and 15,912.20 is: 21,959.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,487.42 : 39,313.26 = 15,912.20 : x
  2. Step 2: Convert to fraction form
    28,487.42/39,313.26 = 15,912.20/x
  3. Step 3: Cross multiply
    28,487.42x = 39,313.26 × 15,912.20
  4. Step 4: Simplify right side
    28,487.42x = 625,560,455.77
  5. Step 5: Solve for x
    x = 625,560,455.77/28,487.42
  6. Step 6: Final answer
    x = 21,959.18

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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.