Home / 20,279.09-30,420.23-7,134.41

Finding the Fourth Proportional to 20,279.09, 30,420.23 and 7,134.41

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Solution

The fourth proportional to 20,279.09, 30,420.23 and 7,134.41 is: 10,702.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.09 : 30,420.23 = 7,134.41 : x
  2. Step 2: Convert to fraction form
    20,279.09/30,420.23 = 7,134.41/x
  3. Step 3: Cross multiply
    20,279.09x = 30,420.23 × 7,134.41
  4. Step 4: Simplify right side
    20,279.09x = 217,030,393.11
  5. Step 5: Solve for x
    x = 217,030,393.11/20,279.09
  6. Step 6: Final answer
    x = 10,702.18

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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.