Home / 30,919.34-42,661.50-20,866.44

Finding the Fourth Proportional to 30,919.34, 42,661.50 and 20,866.44

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Solution

The fourth proportional to 30,919.34, 42,661.50 and 20,866.44 is: 28,790.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,919.34 : 42,661.50 = 20,866.44 : x
  2. Step 2: Convert to fraction form
    30,919.34/42,661.50 = 20,866.44/x
  3. Step 3: Cross multiply
    30,919.34x = 42,661.50 × 20,866.44
  4. Step 4: Simplify right side
    30,919.34x = 890,193,630.06
  5. Step 5: Solve for x
    x = 890,193,630.06/30,919.34
  6. Step 6: Final answer
    x = 28,790.84

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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.