Home / 20,706.45-31,020.48-12,247.62

Finding the Fourth Proportional to 20,706.45, 31,020.48 and 12,247.62

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Solution

The fourth proportional to 20,706.45, 31,020.48 and 12,247.62 is: 18,348.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,706.45 : 31,020.48 = 12,247.62 : x
  2. Step 2: Convert to fraction form
    20,706.45/31,020.48 = 12,247.62/x
  3. Step 3: Cross multiply
    20,706.45x = 31,020.48 × 12,247.62
  4. Step 4: Simplify right side
    20,706.45x = 379,927,051.26
  5. Step 5: Solve for x
    x = 379,927,051.26/20,706.45
  6. Step 6: Final answer
    x = 18,348.25

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1.5x scale

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.