Home / 13,987.36-20,981.12-5,212

Finding the Fourth Proportional to 13,987.36, 20,981.12 and 5,212

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Solution

The fourth proportional to 13,987.36, 20,981.12 and 5,212 is: 7,818.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,987.36 : 20,981.12 = 5,212 : x
  2. Step 2: Convert to fraction form
    13,987.36/20,981.12 = 5,212/x
  3. Step 3: Cross multiply
    13,987.36x = 20,981.12 × 5,212
  4. Step 4: Simplify right side
    13,987.36x = 109,353,597.44
  5. Step 5: Solve for x
    x = 109,353,597.44/13,987.36
  6. Step 6: Final answer
    x = 7,818.03

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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.