Home / 20,946.60-28,911.26-11,999.21

Finding the Fourth Proportional to 20,946.60, 28,911.26 and 11,999.21

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Solution

The fourth proportional to 20,946.60, 28,911.26 and 11,999.21 is: 16,561.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,946.60 : 28,911.26 = 11,999.21 : x
  2. Step 2: Convert to fraction form
    20,946.60/28,911.26 = 11,999.21/x
  3. Step 3: Cross multiply
    20,946.60x = 28,911.26 × 11,999.21
  4. Step 4: Simplify right side
    20,946.60x = 346,912,165.55
  5. Step 5: Solve for x
    x = 346,912,165.55/20,946.60
  6. Step 6: Final answer
    x = 16,561.74

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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.