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Finding the Fourth Proportional to 15,671.89, 23,507.99 and 3,985.11

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Solution

The fourth proportional to 15,671.89, 23,507.99 and 3,985.11 is: 5,977.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,671.89 : 23,507.99 = 3,985.11 : x
  2. Step 2: Convert to fraction form
    15,671.89/23,507.99 = 3,985.11/x
  3. Step 3: Cross multiply
    15,671.89x = 23,507.99 × 3,985.11
  4. Step 4: Simplify right side
    15,671.89x = 93,681,921.05
  5. Step 5: Solve for x
    x = 93,681,921.05/15,671.89
  6. Step 6: Final answer
    x = 5,977.70

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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.