Home / 20,720.48-31,079.84-6,681.29

Finding the Fourth Proportional to 20,720.48, 31,079.84 and 6,681.29

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Solution

The fourth proportional to 20,720.48, 31,079.84 and 6,681.29 is: 10,021.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.48 : 31,079.84 = 6,681.29 : x
  2. Step 2: Convert to fraction form
    20,720.48/31,079.84 = 6,681.29/x
  3. Step 3: Cross multiply
    20,720.48x = 31,079.84 × 6,681.29
  4. Step 4: Simplify right side
    20,720.48x = 207,653,235.39
  5. Step 5: Solve for x
    x = 207,653,235.39/20,720.48
  6. Step 6: Final answer
    x = 10,021.64

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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.