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Finding the Fourth Proportional to 15,108.06, 20,847.03 and 8,821.02

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Solution

The fourth proportional to 15,108.06, 20,847.03 and 8,821.02 is: 12,171.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,108.06 : 20,847.03 = 8,821.02 : x
  2. Step 2: Convert to fraction form
    15,108.06/20,847.03 = 8,821.02/x
  3. Step 3: Cross multiply
    15,108.06x = 20,847.03 × 8,821.02
  4. Step 4: Simplify right side
    15,108.06x = 183,892,068.57
  5. Step 5: Solve for x
    x = 183,892,068.57/15,108.06
  6. Step 6: Final answer
    x = 12,171.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.