Home / 8,988.09-13,485.12-3,989.77

Finding the Fourth Proportional to 8,988.09, 13,485.12 and 3,989.77

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Solution

The fourth proportional to 8,988.09, 13,485.12 and 3,989.77 is: 5,985.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,988.09 : 13,485.12 = 3,989.77 : x
  2. Step 2: Convert to fraction form
    8,988.09/13,485.12 = 3,989.77/x
  3. Step 3: Cross multiply
    8,988.09x = 13,485.12 × 3,989.77
  4. Step 4: Simplify right side
    8,988.09x = 53,802,540.66
  5. Step 5: Solve for x
    x = 53,802,540.66/8,988.09
  6. Step 6: Final answer
    x = 5,985.98

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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.