Home / 11,898.18-16,422.49-7,121.00

Finding the Fourth Proportional to 11,898.18, 16,422.49 and 7,121.00

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Solution

The fourth proportional to 11,898.18, 16,422.49 and 7,121.00 is: 9,828.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,898.18 : 16,422.49 = 7,121.00 : x
  2. Step 2: Convert to fraction form
    11,898.18/16,422.49 = 7,121.00/x
  3. Step 3: Cross multiply
    11,898.18x = 16,422.49 × 7,121.00
  4. Step 4: Simplify right side
    11,898.18x = 116,944,469.18
  5. Step 5: Solve for x
    x = 116,944,469.18/11,898.18
  6. Step 6: Final answer
    x = 9,828.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.