Home / 28,217.72-38,940.89-15,472.06

Finding the Fourth Proportional to 28,217.72, 38,940.89 and 15,472.06

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Solution

The fourth proportional to 28,217.72, 38,940.89 and 15,472.06 is: 21,351.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,217.72 : 38,940.89 = 15,472.06 : x
  2. Step 2: Convert to fraction form
    28,217.72/38,940.89 = 15,472.06/x
  3. Step 3: Cross multiply
    28,217.72x = 38,940.89 × 15,472.06
  4. Step 4: Simplify right side
    28,217.72x = 602,495,709.17
  5. Step 5: Solve for x
    x = 602,495,709.17/28,217.72
  6. Step 6: Final answer
    x = 21,351.68

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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.