Home / 11,921.81-17,875.69-4,526.79

Finding the Fourth Proportional to 11,921.81, 17,875.69 and 4,526.79

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Solution

The fourth proportional to 11,921.81, 17,875.69 and 4,526.79 is: 6,787.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.81 : 17,875.69 = 4,526.79 : x
  2. Step 2: Convert to fraction form
    11,921.81/17,875.69 = 4,526.79/x
  3. Step 3: Cross multiply
    11,921.81x = 17,875.69 × 4,526.79
  4. Step 4: Simplify right side
    11,921.81x = 80,919,416.38
  5. Step 5: Solve for x
    x = 80,919,416.38/11,921.81
  6. Step 6: Final answer
    x = 6,787.51

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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.