Home / 20,279.99-30,420.05-6,239.92

Finding the Fourth Proportional to 20,279.99, 30,420.05 and 6,239.92

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Solution

The fourth proportional to 20,279.99, 30,420.05 and 6,239.92 is: 9,359.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.99 : 30,420.05 = 6,239.92 : x
  2. Step 2: Convert to fraction form
    20,279.99/30,420.05 = 6,239.92/x
  3. Step 3: Cross multiply
    20,279.99x = 30,420.05 × 6,239.92
  4. Step 4: Simplify right side
    20,279.99x = 189,818,495.10
  5. Step 5: Solve for x
    x = 189,818,495.10/20,279.99
  6. Step 6: Final answer
    x = 9,359.89

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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.