Home / 20,941.79-28,899.99-11,990.07

Finding the Fourth Proportional to 20,941.79, 28,899.99 and 11,990.07

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Solution

The fourth proportional to 20,941.79, 28,899.99 and 11,990.07 is: 16,546.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,941.79 : 28,899.99 = 11,990.07 : x
  2. Step 2: Convert to fraction form
    20,941.79/28,899.99 = 11,990.07/x
  3. Step 3: Cross multiply
    20,941.79x = 28,899.99 × 11,990.07
  4. Step 4: Simplify right side
    20,941.79x = 346,512,903.10
  5. Step 5: Solve for x
    x = 346,512,903.10/20,941.79
  6. Step 6: Final answer
    x = 16,546.48

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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.