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Finding the Fourth Proportional to 28,042.70, 42,070.08 and 8,322.62

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Solution

The fourth proportional to 28,042.70, 42,070.08 and 8,322.62 is: 12,485.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,042.70 : 42,070.08 = 8,322.62 : x
  2. Step 2: Convert to fraction form
    28,042.70/42,070.08 = 8,322.62/x
  3. Step 3: Cross multiply
    28,042.70x = 42,070.08 × 8,322.62
  4. Step 4: Simplify right side
    28,042.70x = 350,133,289.21
  5. Step 5: Solve for x
    x = 350,133,289.21/28,042.70
  6. Step 6: Final answer
    x = 12,485.72

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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.