Home / 20,705.56-30,998.12-18,568.40

Finding the Fourth Proportional to 20,705.56, 30,998.12 and 18,568.40

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Solution

The fourth proportional to 20,705.56, 30,998.12 and 18,568.40 is: 27,798.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.56 : 30,998.12 = 18,568.40 : x
  2. Step 2: Convert to fraction form
    20,705.56/30,998.12 = 18,568.40/x
  3. Step 3: Cross multiply
    20,705.56x = 30,998.12 × 18,568.40
  4. Step 4: Simplify right side
    20,705.56x = 575,585,491.41
  5. Step 5: Solve for x
    x = 575,585,491.41/20,705.56
  6. Step 6: Final answer
    x = 27,798.60

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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.