Home / 13,881.72-20,823.48-5,122.80

Finding the Fourth Proportional to 13,881.72, 20,823.48 and 5,122.80

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Solution

The fourth proportional to 13,881.72, 20,823.48 and 5,122.80 is: 7,684.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,881.72 : 20,823.48 = 5,122.80 : x
  2. Step 2: Convert to fraction form
    13,881.72/20,823.48 = 5,122.80/x
  3. Step 3: Cross multiply
    13,881.72x = 20,823.48 × 5,122.80
  4. Step 4: Simplify right side
    13,881.72x = 106,674,523.34
  5. Step 5: Solve for x
    x = 106,674,523.34/13,881.72
  6. Step 6: Final answer
    x = 7,684.53

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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.