Home / 20,923.02-31,379.67-7,781.58

Finding the Fourth Proportional to 20,923.02, 31,379.67 and 7,781.58

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Solution

The fourth proportional to 20,923.02, 31,379.67 and 7,781.58 is: 11,670.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,923.02 : 31,379.67 = 7,781.58 : x
  2. Step 2: Convert to fraction form
    20,923.02/31,379.67 = 7,781.58/x
  3. Step 3: Cross multiply
    20,923.02x = 31,379.67 × 7,781.58
  4. Step 4: Simplify right side
    20,923.02x = 244,183,412.48
  5. Step 5: Solve for x
    x = 244,183,412.48/20,923.02
  6. Step 6: Final answer
    x = 11,670.56

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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.