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Finding the Fourth Proportional to 28,671.90, 42,971.40 and 25,537.20

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Solution

The fourth proportional to 28,671.90, 42,971.40 and 25,537.20 is: 38,273.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,671.90 : 42,971.40 = 25,537.20 : x
  2. Step 2: Convert to fraction form
    28,671.90/42,971.40 = 25,537.20/x
  3. Step 3: Cross multiply
    28,671.90x = 42,971.40 × 25,537.20
  4. Step 4: Simplify right side
    28,671.90x = 1,097,369,236.08
  5. Step 5: Solve for x
    x = 1,097,369,236.08/28,671.90
  6. Step 6: Final answer
    x = 38,273.34

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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.