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Finding the Fourth Proportional to 28,995.64, 43,509.88 and 12,353.92

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Solution

The fourth proportional to 28,995.64, 43,509.88 and 12,353.92 is: 18,537.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,995.64 : 43,509.88 = 12,353.92 : x
  2. Step 2: Convert to fraction form
    28,995.64/43,509.88 = 12,353.92/x
  3. Step 3: Cross multiply
    28,995.64x = 43,509.88 × 12,353.92
  4. Step 4: Simplify right side
    28,995.64x = 537,517,576.73
  5. Step 5: Solve for x
    x = 537,517,576.73/28,995.64
  6. Step 6: Final answer
    x = 18,537.88

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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.