Home / 20,370.10-30,405.33-18,942.32

Finding the Fourth Proportional to 20,370.10, 30,405.33 and 18,942.32

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Solution

The fourth proportional to 20,370.10, 30,405.33 and 18,942.32 is: 28,274.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,370.10 : 30,405.33 = 18,942.32 : x
  2. Step 2: Convert to fraction form
    20,370.10/30,405.33 = 18,942.32/x
  3. Step 3: Cross multiply
    20,370.10x = 30,405.33 × 18,942.32
  4. Step 4: Simplify right side
    20,370.10x = 575,947,566.58
  5. Step 5: Solve for x
    x = 575,947,566.58/20,370.10
  6. Step 6: Final answer
    x = 28,274.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.