Home / 21,324.50-31,979.62-7,089.69

Finding the Fourth Proportional to 21,324.50, 31,979.62 and 7,089.69

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Solution

The fourth proportional to 21,324.50, 31,979.62 and 7,089.69 is: 10,632.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,324.50 : 31,979.62 = 7,089.69 : x
  2. Step 2: Convert to fraction form
    21,324.50/31,979.62 = 7,089.69/x
  3. Step 3: Cross multiply
    21,324.50x = 31,979.62 × 7,089.69
  4. Step 4: Simplify right side
    21,324.50x = 226,725,681.02
  5. Step 5: Solve for x
    x = 226,725,681.02/21,324.50
  6. Step 6: Final answer
    x = 10,632.17

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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.