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Finding the Fourth Proportional to 28,379.48, 42,569.28 and 10,851.08

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Solution

The fourth proportional to 28,379.48, 42,569.28 and 10,851.08 is: 16,276.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,379.48 : 42,569.28 = 10,851.08 : x
  2. Step 2: Convert to fraction form
    28,379.48/42,569.28 = 10,851.08/x
  3. Step 3: Cross multiply
    28,379.48x = 42,569.28 × 10,851.08
  4. Step 4: Simplify right side
    28,379.48x = 461,922,662.82
  5. Step 5: Solve for x
    x = 461,922,662.82/28,379.48
  6. Step 6: Final answer
    x = 16,276.64

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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.