Home / 20,139.30-30,214.98-6,991.74

Finding the Fourth Proportional to 20,139.30, 30,214.98 and 6,991.74

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Solution

The fourth proportional to 20,139.30, 30,214.98 and 6,991.74 is: 10,489.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.30 : 30,214.98 = 6,991.74 : x
  2. Step 2: Convert to fraction form
    20,139.30/30,214.98 = 6,991.74/x
  3. Step 3: Cross multiply
    20,139.30x = 30,214.98 × 6,991.74
  4. Step 4: Simplify right side
    20,139.30x = 211,255,284.27
  5. Step 5: Solve for x
    x = 211,255,284.27/20,139.30
  6. Step 6: Final answer
    x = 10,489.70

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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.