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Finding the Fourth Proportional to 18,667.91, 27,979.61 and 13,015.01

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Solution

The fourth proportional to 18,667.91, 27,979.61 and 13,015.01 is: 19,507.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,667.91 : 27,979.61 = 13,015.01 : x
  2. Step 2: Convert to fraction form
    18,667.91/27,979.61 = 13,015.01/x
  3. Step 3: Cross multiply
    18,667.91x = 27,979.61 × 13,015.01
  4. Step 4: Simplify right side
    18,667.91x = 364,154,838.87
  5. Step 5: Solve for x
    x = 364,154,838.87/18,667.91
  6. Step 6: Final answer
    x = 19,507.00

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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.