Home / 20,930.23-31,401.02-6,139.02

Finding the Fourth Proportional to 20,930.23, 31,401.02 and 6,139.02

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Solution

The fourth proportional to 20,930.23, 31,401.02 and 6,139.02 is: 9,210.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.23 : 31,401.02 = 6,139.02 : x
  2. Step 2: Convert to fraction form
    20,930.23/31,401.02 = 6,139.02/x
  3. Step 3: Cross multiply
    20,930.23x = 31,401.02 × 6,139.02
  4. Step 4: Simplify right side
    20,930.23x = 192,771,489.80
  5. Step 5: Solve for x
    x = 192,771,489.80/20,930.23
  6. Step 6: Final answer
    x = 9,210.19

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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.