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Finding the Fourth Proportional to 28,443.96, 42,665.76 and 7,383.96

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Solution

The fourth proportional to 28,443.96, 42,665.76 and 7,383.96 is: 11,075.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,443.96 : 42,665.76 = 7,383.96 : x
  2. Step 2: Convert to fraction form
    28,443.96/42,665.76 = 7,383.96/x
  3. Step 3: Cross multiply
    28,443.96x = 42,665.76 × 7,383.96
  4. Step 4: Simplify right side
    28,443.96x = 315,042,265.21
  5. Step 5: Solve for x
    x = 315,042,265.21/28,443.96
  6. Step 6: Final answer
    x = 11,075.89

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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.