Home / 13,985.22-20,981.48-5,220.83

Finding the Fourth Proportional to 13,985.22, 20,981.48 and 5,220.83

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Solution

The fourth proportional to 13,985.22, 20,981.48 and 5,220.83 is: 7,832.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,985.22 : 20,981.48 = 5,220.83 : x
  2. Step 2: Convert to fraction form
    13,985.22/20,981.48 = 5,220.83/x
  3. Step 3: Cross multiply
    13,985.22x = 20,981.48 × 5,220.83
  4. Step 4: Simplify right side
    13,985.22x = 109,540,609.22
  5. Step 5: Solve for x
    x = 109,540,609.22/13,985.22
  6. Step 6: Final answer
    x = 7,832.60

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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.