Home / 20,137.60-30,206.40-6,991.30

Finding the Fourth Proportional to 20,137.60, 30,206.40 and 6,991.30

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Solution

The fourth proportional to 20,137.60, 30,206.40 and 6,991.30 is: 10,486.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,137.60 : 30,206.40 = 6,991.30 : x
  2. Step 2: Convert to fraction form
    20,137.60/30,206.40 = 6,991.30/x
  3. Step 3: Cross multiply
    20,137.60x = 30,206.40 × 6,991.30
  4. Step 4: Simplify right side
    20,137.60x = 211,182,004.32
  5. Step 5: Solve for x
    x = 211,182,004.32/20,137.60
  6. Step 6: Final answer
    x = 10,486.95

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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.