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Finding the Fourth Proportional to 28,576.64, 42,866.88 and 11,937.92

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Solution

The fourth proportional to 28,576.64, 42,866.88 and 11,937.92 is: 17,907.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,576.64 : 42,866.88 = 11,937.92 : x
  2. Step 2: Convert to fraction form
    28,576.64/42,866.88 = 11,937.92/x
  3. Step 3: Cross multiply
    28,576.64x = 42,866.88 × 11,937.92
  4. Step 4: Simplify right side
    28,576.64x = 511,741,384.09
  5. Step 5: Solve for x
    x = 511,741,384.09/28,576.64
  6. Step 6: Final answer
    x = 17,907.68

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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.