Home / 21,929.54-30,245.67-20,142.54

Finding the Fourth Proportional to 21,929.54, 30,245.67 and 20,142.54

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Solution

The fourth proportional to 21,929.54, 30,245.67 and 20,142.54 is: 27,781.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,929.54 : 30,245.67 = 20,142.54 : x
  2. Step 2: Convert to fraction form
    21,929.54/30,245.67 = 20,142.54/x
  3. Step 3: Cross multiply
    21,929.54x = 30,245.67 × 20,142.54
  4. Step 4: Simplify right side
    21,929.54x = 609,224,617.80
  5. Step 5: Solve for x
    x = 609,224,617.80/21,929.54
  6. Step 6: Final answer
    x = 27,781.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.