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Finding the Fourth Proportional to 28,918.36, 43,373.70 and 8,143.48

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Solution

The fourth proportional to 28,918.36, 43,373.70 and 8,143.48 is: 12,214.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,918.36 : 43,373.70 = 8,143.48 : x
  2. Step 2: Convert to fraction form
    28,918.36/43,373.70 = 8,143.48/x
  3. Step 3: Cross multiply
    28,918.36x = 43,373.70 × 8,143.48
  4. Step 4: Simplify right side
    28,918.36x = 353,212,858.48
  5. Step 5: Solve for x
    x = 353,212,858.48/28,918.36
  6. Step 6: Final answer
    x = 12,214.14

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1.5x scale

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.