Home / 20,971.14-28,941.38-12,020.14

Finding the Fourth Proportional to 20,971.14, 28,941.38 and 12,020.14

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Solution

The fourth proportional to 20,971.14, 28,941.38 and 12,020.14 is: 16,588.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.14 : 28,941.38 = 12,020.14 : x
  2. Step 2: Convert to fraction form
    20,971.14/28,941.38 = 12,020.14/x
  3. Step 3: Cross multiply
    20,971.14x = 28,941.38 × 12,020.14
  4. Step 4: Simplify right side
    20,971.14x = 347,879,306.94
  5. Step 5: Solve for x
    x = 347,879,306.94/20,971.14
  6. Step 6: Final answer
    x = 16,588.48

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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.