Home / 20,675.28-31,007.32-8,985.84

Finding the Fourth Proportional to 20,675.28, 31,007.32 and 8,985.84

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Solution

The fourth proportional to 20,675.28, 31,007.32 and 8,985.84 is: 13,476.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,675.28 : 31,007.32 = 8,985.84 : x
  2. Step 2: Convert to fraction form
    20,675.28/31,007.32 = 8,985.84/x
  3. Step 3: Cross multiply
    20,675.28x = 31,007.32 × 8,985.84
  4. Step 4: Simplify right side
    20,675.28x = 278,626,816.35
  5. Step 5: Solve for x
    x = 278,626,816.35/20,675.28
  6. Step 6: Final answer
    x = 13,476.33

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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.