Home / 30,968.55-42,754.34-20,388.94

Finding the Fourth Proportional to 30,968.55, 42,754.34 and 20,388.94

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Solution

The fourth proportional to 30,968.55, 42,754.34 and 20,388.94 is: 28,148.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,968.55 : 42,754.34 = 20,388.94 : x
  2. Step 2: Convert to fraction form
    30,968.55/42,754.34 = 20,388.94/x
  3. Step 3: Cross multiply
    30,968.55x = 42,754.34 × 20,388.94
  4. Step 4: Simplify right side
    30,968.55x = 871,715,464.17
  5. Step 5: Solve for x
    x = 871,715,464.17/30,968.55
  6. Step 6: Final answer
    x = 28,148.41

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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.