Home / 20,139.03-30,210.17-6,811.90

Finding the Fourth Proportional to 20,139.03, 30,210.17 and 6,811.90

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Solution

The fourth proportional to 20,139.03, 30,210.17 and 6,811.90 is: 10,218.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.03 : 30,210.17 = 6,811.90 : x
  2. Step 2: Convert to fraction form
    20,139.03/30,210.17 = 6,811.90/x
  3. Step 3: Cross multiply
    20,139.03x = 30,210.17 × 6,811.90
  4. Step 4: Simplify right side
    20,139.03x = 205,788,547.44
  5. Step 5: Solve for x
    x = 205,788,547.44/20,139.03
  6. Step 6: Final answer
    x = 10,218.39

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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.