Home / 15,912.72-21,948.48-12,928.56

Finding the Fourth Proportional to 15,912.72, 21,948.48 and 12,928.56

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Solution

The fourth proportional to 15,912.72, 21,948.48 and 12,928.56 is: 17,832.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,912.72 : 21,948.48 = 12,928.56 : x
  2. Step 2: Convert to fraction form
    15,912.72/21,948.48 = 12,928.56/x
  3. Step 3: Cross multiply
    15,912.72x = 21,948.48 × 12,928.56
  4. Step 4: Simplify right side
    15,912.72x = 283,762,240.59
  5. Step 5: Solve for x
    x = 283,762,240.59/15,912.72
  6. Step 6: Final answer
    x = 17,832.42

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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.