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Finding the Fourth Proportional to 28,934.80, 43,406.40 and 12,294.80

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Solution

The fourth proportional to 28,934.80, 43,406.40 and 12,294.80 is: 18,443.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,934.80 : 43,406.40 = 12,294.80 : x
  2. Step 2: Convert to fraction form
    28,934.80/43,406.40 = 12,294.80/x
  3. Step 3: Cross multiply
    28,934.80x = 43,406.40 × 12,294.80
  4. Step 4: Simplify right side
    28,934.80x = 533,673,006.72
  5. Step 5: Solve for x
    x = 533,673,006.72/28,934.80
  6. Step 6: Final answer
    x = 18,443.98

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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.