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Finding the Fourth Proportional to 28,031.52, 38,683.26 and 15,456

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Solution

The fourth proportional to 28,031.52, 38,683.26 and 15,456 is: 21,329.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,031.52 : 38,683.26 = 15,456 : x
  2. Step 2: Convert to fraction form
    28,031.52/38,683.26 = 15,456/x
  3. Step 3: Cross multiply
    28,031.52x = 38,683.26 × 15,456
  4. Step 4: Simplify right side
    28,031.52x = 597,888,466.56
  5. Step 5: Solve for x
    x = 597,888,466.56/28,031.52
  6. Step 6: Final answer
    x = 21,329.15

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