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Finding the Fourth Proportional to 28,611.54, 42,919.19 and 9,893.38

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Solution

The fourth proportional to 28,611.54, 42,919.19 and 9,893.38 is: 14,840.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,611.54 : 42,919.19 = 9,893.38 : x
  2. Step 2: Convert to fraction form
    28,611.54/42,919.19 = 9,893.38/x
  3. Step 3: Cross multiply
    28,611.54x = 42,919.19 × 9,893.38
  4. Step 4: Simplify right side
    28,611.54x = 424,615,855.96
  5. Step 5: Solve for x
    x = 424,615,855.96/28,611.54
  6. Step 6: Final answer
    x = 14,840.72

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1.5x scale

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.