Home / 20,235.12-30,202.83-18,988.53

Finding the Fourth Proportional to 20,235.12, 30,202.83 and 18,988.53

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Solution

The fourth proportional to 20,235.12, 30,202.83 and 18,988.53 is: 28,342.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,235.12 : 30,202.83 = 18,988.53 : x
  2. Step 2: Convert to fraction form
    20,235.12/30,202.83 = 18,988.53/x
  3. Step 3: Cross multiply
    20,235.12x = 30,202.83 × 18,988.53
  4. Step 4: Simplify right side
    20,235.12x = 573,507,343.54
  5. Step 5: Solve for x
    x = 573,507,343.54/20,235.12
  6. Step 6: Final answer
    x = 28,342.18

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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.