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Finding the Fourth Proportional to 18,769.60, 25,892.16 and 13,994.56

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Solution

The fourth proportional to 18,769.60, 25,892.16 and 13,994.56 is: 19,305.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,769.60 : 25,892.16 = 13,994.56 : x
  2. Step 2: Convert to fraction form
    18,769.60/25,892.16 = 13,994.56/x
  3. Step 3: Cross multiply
    18,769.60x = 25,892.16 × 13,994.56
  4. Step 4: Simplify right side
    18,769.60x = 362,349,386.65
  5. Step 5: Solve for x
    x = 362,349,386.65/18,769.60
  6. Step 6: Final answer
    x = 19,305.12

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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.