Home / 20,440.10-30,643.95-11,206.10

Finding the Fourth Proportional to 20,440.10, 30,643.95 and 11,206.10

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Solution

The fourth proportional to 20,440.10, 30,643.95 and 11,206.10 is: 16,800.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.10 : 30,643.95 = 11,206.10 : x
  2. Step 2: Convert to fraction form
    20,440.10/30,643.95 = 11,206.10/x
  3. Step 3: Cross multiply
    20,440.10x = 30,643.95 × 11,206.10
  4. Step 4: Simplify right side
    20,440.10x = 343,399,168.10
  5. Step 5: Solve for x
    x = 343,399,168.10/20,440.10
  6. Step 6: Final answer
    x = 16,800.27

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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.