Home / 20,487.28-30,720.64-11,941.48

Finding the Fourth Proportional to 20,487.28, 30,720.64 and 11,941.48

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Solution

The fourth proportional to 20,487.28, 30,720.64 and 11,941.48 is: 17,906.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.28 : 30,720.64 = 11,941.48 : x
  2. Step 2: Convert to fraction form
    20,487.28/30,720.64 = 11,941.48/x
  3. Step 3: Cross multiply
    20,487.28x = 30,720.64 × 11,941.48
  4. Step 4: Simplify right side
    20,487.28x = 366,849,908.15
  5. Step 5: Solve for x
    x = 366,849,908.15/20,487.28
  6. Step 6: Final answer
    x = 17,906.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.