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Finding the Fourth Proportional to 28,447.90, 42,661.05 and 9,468.93

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Solution

The fourth proportional to 28,447.90, 42,661.05 and 9,468.93 is: 14,199.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,447.90 : 42,661.05 = 9,468.93 : x
  2. Step 2: Convert to fraction form
    28,447.90/42,661.05 = 9,468.93/x
  3. Step 3: Cross multiply
    28,447.90x = 42,661.05 × 9,468.93
  4. Step 4: Simplify right side
    28,447.90x = 403,954,496.18
  5. Step 5: Solve for x
    x = 403,954,496.18/28,447.90
  6. Step 6: Final answer
    x = 14,199.80

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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.