Home / 30,667.65-45,979.94-11,931.90

Finding the Fourth Proportional to 30,667.65, 45,979.94 and 11,931.90

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Solution

The fourth proportional to 30,667.65, 45,979.94 and 11,931.90 is: 17,889.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,667.65 : 45,979.94 = 11,931.90 : x
  2. Step 2: Convert to fraction form
    30,667.65/45,979.94 = 11,931.90/x
  3. Step 3: Cross multiply
    30,667.65x = 45,979.94 × 11,931.90
  4. Step 4: Simplify right side
    30,667.65x = 548,627,903.49
  5. Step 5: Solve for x
    x = 548,627,903.49/30,667.65
  6. Step 6: Final answer
    x = 17,889.47

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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.