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Finding the Fourth Proportional to 9,985.72, 14,978.46 and 2,589.52

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Solution

The fourth proportional to 9,985.72, 14,978.46 and 2,589.52 is: 3,884.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,985.72 : 14,978.46 = 2,589.52 : x
  2. Step 2: Convert to fraction form
    9,985.72/14,978.46 = 2,589.52/x
  3. Step 3: Cross multiply
    9,985.72x = 14,978.46 × 2,589.52
  4. Step 4: Simplify right side
    9,985.72x = 38,787,021.74
  5. Step 5: Solve for x
    x = 38,787,021.74/9,985.72
  6. Step 6: Final answer
    x = 3,884.25

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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.