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Finding the Fourth Proportional to 29,959.80, 44,903.70 and 12,420.60

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Solution

The fourth proportional to 29,959.80, 44,903.70 and 12,420.60 is: 18,615.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,959.80 : 44,903.70 = 12,420.60 : x
  2. Step 2: Convert to fraction form
    29,959.80/44,903.70 = 12,420.60/x
  3. Step 3: Cross multiply
    29,959.80x = 44,903.70 × 12,420.60
  4. Step 4: Simplify right side
    29,959.80x = 557,730,896.22
  5. Step 5: Solve for x
    x = 557,730,896.22/29,959.80
  6. Step 6: Final answer
    x = 18,615.98

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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.