Home / 20,779.60-31,145.84-7,446.44

Finding the Fourth Proportional to 20,779.60, 31,145.84 and 7,446.44

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Solution

The fourth proportional to 20,779.60, 31,145.84 and 7,446.44 is: 11,161.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.60 : 31,145.84 = 7,446.44 : x
  2. Step 2: Convert to fraction form
    20,779.60/31,145.84 = 7,446.44/x
  3. Step 3: Cross multiply
    20,779.60x = 31,145.84 × 7,446.44
  4. Step 4: Simplify right side
    20,779.60x = 231,925,628.81
  5. Step 5: Solve for x
    x = 231,925,628.81/20,779.60
  6. Step 6: Final answer
    x = 11,161.22

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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.