Home / 20,869.60-31,276.68-7,709.84

Finding the Fourth Proportional to 20,869.60, 31,276.68 and 7,709.84

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Solution

The fourth proportional to 20,869.60, 31,276.68 and 7,709.84 is: 11,554.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.60 : 31,276.68 = 7,709.84 : x
  2. Step 2: Convert to fraction form
    20,869.60/31,276.68 = 7,709.84/x
  3. Step 3: Cross multiply
    20,869.60x = 31,276.68 × 7,709.84
  4. Step 4: Simplify right side
    20,869.60x = 241,138,198.53
  5. Step 5: Solve for x
    x = 241,138,198.53/20,869.60
  6. Step 6: Final answer
    x = 11,554.52

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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.