Home / 21,179.79-31,769.69-6,389.19

Finding the Fourth Proportional to 21,179.79, 31,769.69 and 6,389.19

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Solution

The fourth proportional to 21,179.79, 31,769.69 and 6,389.19 is: 9,583.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.79 : 31,769.69 = 6,389.19 : x
  2. Step 2: Convert to fraction form
    21,179.79/31,769.69 = 6,389.19/x
  3. Step 3: Cross multiply
    21,179.79x = 31,769.69 × 6,389.19
  4. Step 4: Simplify right side
    21,179.79x = 202,982,553.71
  5. Step 5: Solve for x
    x = 202,982,553.71/21,179.79
  6. Step 6: Final answer
    x = 9,583.79

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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.