Home / 30,793.28-42,501.12-20,163.20

Finding the Fourth Proportional to 30,793.28, 42,501.12 and 20,163.20

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Solution

The fourth proportional to 30,793.28, 42,501.12 and 20,163.20 is: 27,829.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,793.28 : 42,501.12 = 20,163.20 : x
  2. Step 2: Convert to fraction form
    30,793.28/42,501.12 = 20,163.20/x
  3. Step 3: Cross multiply
    30,793.28x = 42,501.12 × 20,163.20
  4. Step 4: Simplify right side
    30,793.28x = 856,958,582.78
  5. Step 5: Solve for x
    x = 856,958,582.78/30,793.28
  6. Step 6: Final answer
    x = 27,829.40

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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.