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Finding the Fourth Proportional to 28,379.40, 42,569.10 and 16,091.40

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Solution

The fourth proportional to 28,379.40, 42,569.10 and 16,091.40 is: 24,137.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,379.40 : 42,569.10 = 16,091.40 : x
  2. Step 2: Convert to fraction form
    28,379.40/42,569.10 = 16,091.40/x
  3. Step 3: Cross multiply
    28,379.40x = 42,569.10 × 16,091.40
  4. Step 4: Simplify right side
    28,379.40x = 684,996,415.74
  5. Step 5: Solve for x
    x = 684,996,415.74/28,379.40
  6. Step 6: Final answer
    x = 24,137.10

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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.