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Finding the Fourth Proportional to 28,604.16, 42,895.71 and 9,879.39

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Solution

The fourth proportional to 28,604.16, 42,895.71 and 9,879.39 is: 14,815.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,604.16 : 42,895.71 = 9,879.39 : x
  2. Step 2: Convert to fraction form
    28,604.16/42,895.71 = 9,879.39/x
  3. Step 3: Cross multiply
    28,604.16x = 42,895.71 × 9,879.39
  4. Step 4: Simplify right side
    28,604.16x = 423,783,448.42
  5. Step 5: Solve for x
    x = 423,783,448.42/28,604.16
  6. Step 6: Final answer
    x = 14,815.45

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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.