Home / 20,881.26-28,817.64-11,931.48

Finding the Fourth Proportional to 20,881.26, 28,817.64 and 11,931.48

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Solution

The fourth proportional to 20,881.26, 28,817.64 and 11,931.48 is: 16,466.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.26 : 28,817.64 = 11,931.48 : x
  2. Step 2: Convert to fraction form
    20,881.26/28,817.64 = 11,931.48/x
  3. Step 3: Cross multiply
    20,881.26x = 28,817.64 × 11,931.48
  4. Step 4: Simplify right side
    20,881.26x = 343,837,095.31
  5. Step 5: Solve for x
    x = 343,837,095.31/20,881.26
  6. Step 6: Final answer
    x = 16,466.30

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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.