Home / 20,768.96-31,153.61-5,186.58

Finding the Fourth Proportional to 20,768.96, 31,153.61 and 5,186.58

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Solution

The fourth proportional to 20,768.96, 31,153.61 and 5,186.58 is: 7,779.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.96 : 31,153.61 = 5,186.58 : x
  2. Step 2: Convert to fraction form
    20,768.96/31,153.61 = 5,186.58/x
  3. Step 3: Cross multiply
    20,768.96x = 31,153.61 × 5,186.58
  4. Step 4: Simplify right side
    20,768.96x = 161,580,690.55
  5. Step 5: Solve for x
    x = 161,580,690.55/20,768.96
  6. Step 6: Final answer
    x = 7,779.91

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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.