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Finding the Fourth Proportional to 28,704.98, 43,064.46 and 9,985.48

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Solution

The fourth proportional to 28,704.98, 43,064.46 and 9,985.48 is: 14,980.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,704.98 : 43,064.46 = 9,985.48 : x
  2. Step 2: Convert to fraction form
    28,704.98/43,064.46 = 9,985.48/x
  3. Step 3: Cross multiply
    28,704.98x = 43,064.46 × 9,985.48
  4. Step 4: Simplify right side
    28,704.98x = 430,019,196.38
  5. Step 5: Solve for x
    x = 430,019,196.38/28,704.98
  6. Step 6: Final answer
    x = 14,980.65

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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.