Home / 20,768.86-31,153.14-5,186.48

Finding the Fourth Proportional to 20,768.86, 31,153.14 and 5,186.48

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Solution

The fourth proportional to 20,768.86, 31,153.14 and 5,186.48 is: 7,779.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.86 : 31,153.14 = 5,186.48 : x
  2. Step 2: Convert to fraction form
    20,768.86/31,153.14 = 5,186.48/x
  3. Step 3: Cross multiply
    20,768.86x = 31,153.14 × 5,186.48
  4. Step 4: Simplify right side
    20,768.86x = 161,575,137.55
  5. Step 5: Solve for x
    x = 161,575,137.55/20,768.86
  6. Step 6: Final answer
    x = 7,779.68

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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.