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Finding the Fourth Proportional to 18,612.70, 27,913.12 and 6,129.95

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Solution

The fourth proportional to 18,612.70, 27,913.12 and 6,129.95 is: 9,192.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,612.70 : 27,913.12 = 6,129.95 : x
  2. Step 2: Convert to fraction form
    18,612.70/27,913.12 = 6,129.95/x
  3. Step 3: Cross multiply
    18,612.70x = 27,913.12 × 6,129.95
  4. Step 4: Simplify right side
    18,612.70x = 171,105,875.05
  5. Step 5: Solve for x
    x = 171,105,875.05/18,612.70
  6. Step 6: Final answer
    x = 9,192.96

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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.