Home / 20,820.40-31,230.60-6,029.80

Finding the Fourth Proportional to 20,820.40, 31,230.60 and 6,029.80

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Solution

The fourth proportional to 20,820.40, 31,230.60 and 6,029.80 is: 9,044.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.40 : 31,230.60 = 6,029.80 : x
  2. Step 2: Convert to fraction form
    20,820.40/31,230.60 = 6,029.80/x
  3. Step 3: Cross multiply
    20,820.40x = 31,230.60 × 6,029.80
  4. Step 4: Simplify right side
    20,820.40x = 188,314,271.88
  5. Step 5: Solve for x
    x = 188,314,271.88/20,820.40
  6. Step 6: Final answer
    x = 9,044.70

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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.