Home / 20,940.65-31,412.15-6,710.36

Finding the Fourth Proportional to 20,940.65, 31,412.15 and 6,710.36

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Solution

The fourth proportional to 20,940.65, 31,412.15 and 6,710.36 is: 10,065.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.65 : 31,412.15 = 6,710.36 : x
  2. Step 2: Convert to fraction form
    20,940.65/31,412.15 = 6,710.36/x
  3. Step 3: Cross multiply
    20,940.65x = 31,412.15 × 6,710.36
  4. Step 4: Simplify right side
    20,940.65x = 210,786,801.32
  5. Step 5: Solve for x
    x = 210,786,801.32/20,940.65
  6. Step 6: Final answer
    x = 10,065.92

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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.