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Finding the Fourth Proportional to 28,934.89, 43,387.98 and 9,210.89

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Solution

The fourth proportional to 28,934.89, 43,387.98 and 9,210.89 is: 13,811.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,934.89 : 43,387.98 = 9,210.89 : x
  2. Step 2: Convert to fraction form
    28,934.89/43,387.98 = 9,210.89/x
  3. Step 3: Cross multiply
    28,934.89x = 43,387.98 × 9,210.89
  4. Step 4: Simplify right side
    28,934.89x = 399,641,648.11
  5. Step 5: Solve for x
    x = 399,641,648.11/28,934.89
  6. Step 6: Final answer
    x = 13,811.76

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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.