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Finding the Fourth Proportional to 18,667.53, 25,752.11 and 11,947.77

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Solution

The fourth proportional to 18,667.53, 25,752.11 and 11,947.77 is: 16,482.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,667.53 : 25,752.11 = 11,947.77 : x
  2. Step 2: Convert to fraction form
    18,667.53/25,752.11 = 11,947.77/x
  3. Step 3: Cross multiply
    18,667.53x = 25,752.11 × 11,947.77
  4. Step 4: Simplify right side
    18,667.53x = 307,680,287.29
  5. Step 5: Solve for x
    x = 307,680,287.29/18,667.53
  6. Step 6: Final answer
    x = 16,482.11

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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.