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Finding the Fourth Proportional to 28,000.08, 42,008.32 and 8,279.15

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Solution

The fourth proportional to 28,000.08, 42,008.32 and 8,279.15 is: 12,421.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,000.08 : 42,008.32 = 8,279.15 : x
  2. Step 2: Convert to fraction form
    28,000.08/42,008.32 = 8,279.15/x
  3. Step 3: Cross multiply
    28,000.08x = 42,008.32 × 8,279.15
  4. Step 4: Simplify right side
    28,000.08x = 347,793,203.23
  5. Step 5: Solve for x
    x = 347,793,203.23/28,000.08
  6. Step 6: Final answer
    x = 12,421.15

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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.