Home / 20,813.06-28,722-11,381.62

Finding the Fourth Proportional to 20,813.06, 28,722 and 11,381.62

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Solution

The fourth proportional to 20,813.06, 28,722 and 11,381.62 is: 15,706.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.06 : 28,722 = 11,381.62 : x
  2. Step 2: Convert to fraction form
    20,813.06/28,722 = 11,381.62/x
  3. Step 3: Cross multiply
    20,813.06x = 28,722 × 11,381.62
  4. Step 4: Simplify right side
    20,813.06x = 326,902,746.03
  5. Step 5: Solve for x
    x = 326,902,746.03/20,813.06
  6. Step 6: Final answer
    x = 15,706.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.