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Finding the Fourth Proportional to 28,224, 38,951.28 and 15,649.92

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Solution

The fourth proportional to 28,224, 38,951.28 and 15,649.92 is: 21,598.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,224 : 38,951.28 = 15,649.92 : x
  2. Step 2: Convert to fraction form
    28,224/38,951.28 = 15,649.92/x
  3. Step 3: Cross multiply
    28,224x = 38,951.28 × 15,649.92
  4. Step 4: Simplify right side
    28,224x = 609,584,415.90
  5. Step 5: Solve for x
    x = 609,584,415.90/28,224
  6. Step 6: Final answer
    x = 21,598.09

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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.