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Finding the Fourth Proportional to 28,382.42, 42,573.63 and 8,661.08

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Solution

The fourth proportional to 28,382.42, 42,573.63 and 8,661.08 is: 12,991.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,382.42 : 42,573.63 = 8,661.08 : x
  2. Step 2: Convert to fraction form
    28,382.42/42,573.63 = 8,661.08/x
  3. Step 3: Cross multiply
    28,382.42x = 42,573.63 × 8,661.08
  4. Step 4: Simplify right side
    28,382.42x = 368,733,615.32
  5. Step 5: Solve for x
    x = 368,733,615.32/28,382.42
  6. Step 6: Final answer
    x = 12,991.62

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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.