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Finding the Fourth Proportional to 28,128.52, 42,195.20 and 7,352

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Solution

The fourth proportional to 28,128.52, 42,195.20 and 7,352 is: 11,028.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,128.52 : 42,195.20 = 7,352 : x
  2. Step 2: Convert to fraction form
    28,128.52/42,195.20 = 7,352/x
  3. Step 3: Cross multiply
    28,128.52x = 42,195.20 × 7,352
  4. Step 4: Simplify right side
    28,128.52x = 310,219,110.40
  5. Step 5: Solve for x
    x = 310,219,110.40/28,128.52
  6. Step 6: Final answer
    x = 11,028.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.