Home / 20,971.76-28,941.04-12,588.26

Finding the Fourth Proportional to 20,971.76, 28,941.04 and 12,588.26

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Solution

The fourth proportional to 20,971.76, 28,941.04 and 12,588.26 is: 17,371.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.76 : 28,941.04 = 12,588.26 : x
  2. Step 2: Convert to fraction form
    20,971.76/28,941.04 = 12,588.26/x
  3. Step 3: Cross multiply
    20,971.76x = 28,941.04 × 12,588.26
  4. Step 4: Simplify right side
    20,971.76x = 364,317,336.19
  5. Step 5: Solve for x
    x = 364,317,336.19/20,971.76
  6. Step 6: Final answer
    x = 17,371.81

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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.