Home / 30,958.70-42,729.81-20,349.32

Finding the Fourth Proportional to 30,958.70, 42,729.81 and 20,349.32

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Solution

The fourth proportional to 30,958.70, 42,729.81 and 20,349.32 is: 28,086.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,958.70 : 42,729.81 = 20,349.32 : x
  2. Step 2: Convert to fraction form
    30,958.70/42,729.81 = 20,349.32/x
  3. Step 3: Cross multiply
    30,958.70x = 42,729.81 × 20,349.32
  4. Step 4: Simplify right side
    30,958.70x = 869,522,577.23
  5. Step 5: Solve for x
    x = 869,522,577.23/30,958.70
  6. Step 6: Final answer
    x = 28,086.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.