Home / 21,018.45-31,527.61-6,979.54

Finding the Fourth Proportional to 21,018.45, 31,527.61 and 6,979.54

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Solution

The fourth proportional to 21,018.45, 31,527.61 and 6,979.54 is: 10,469.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.45 : 31,527.61 = 6,979.54 : x
  2. Step 2: Convert to fraction form
    21,018.45/31,527.61 = 6,979.54/x
  3. Step 3: Cross multiply
    21,018.45x = 31,527.61 × 6,979.54
  4. Step 4: Simplify right side
    21,018.45x = 220,048,180.20
  5. Step 5: Solve for x
    x = 220,048,180.20/21,018.45
  6. Step 6: Final answer
    x = 10,469.29

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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.