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Finding the Fourth Proportional to 28,990.78, 43,484.78 and 10,270.52

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Solution

The fourth proportional to 28,990.78, 43,484.78 and 10,270.52 is: 15,405.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,990.78 : 43,484.78 = 10,270.52 : x
  2. Step 2: Convert to fraction form
    28,990.78/43,484.78 = 10,270.52/x
  3. Step 3: Cross multiply
    28,990.78x = 43,484.78 × 10,270.52
  4. Step 4: Simplify right side
    28,990.78x = 446,611,302.69
  5. Step 5: Solve for x
    x = 446,611,302.69/28,990.78
  6. Step 6: Final answer
    x = 15,405.29

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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.