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Finding the Fourth Proportional to 18,802.16, 25,939.68 and 12,086.88

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Solution

The fourth proportional to 18,802.16, 25,939.68 and 12,086.88 is: 16,675.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,802.16 : 25,939.68 = 12,086.88 : x
  2. Step 2: Convert to fraction form
    18,802.16/25,939.68 = 12,086.88/x
  3. Step 3: Cross multiply
    18,802.16x = 25,939.68 × 12,086.88
  4. Step 4: Simplify right side
    18,802.16x = 313,529,799.40
  5. Step 5: Solve for x
    x = 313,529,799.40/18,802.16
  6. Step 6: Final answer
    x = 16,675.20

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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.