Home / 13,987.66-20,985.10-5,222.64

Finding the Fourth Proportional to 13,987.66, 20,985.10 and 5,222.64

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Solution

The fourth proportional to 13,987.66, 20,985.10 and 5,222.64 is: 7,835.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,987.66 : 20,985.10 = 5,222.64 : x
  2. Step 2: Convert to fraction form
    13,987.66/20,985.10 = 5,222.64/x
  3. Step 3: Cross multiply
    13,987.66x = 20,985.10 × 5,222.64
  4. Step 4: Simplify right side
    13,987.66x = 109,597,622.66
  5. Step 5: Solve for x
    x = 109,597,622.66/13,987.66
  6. Step 6: Final answer
    x = 7,835.31

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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.