Home / 30,807.20-42,494.36-20,197.52

Finding the Fourth Proportional to 30,807.20, 42,494.36 and 20,197.52

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Solution

The fourth proportional to 30,807.20, 42,494.36 and 20,197.52 is: 27,859.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,807.20 : 42,494.36 = 20,197.52 : x
  2. Step 2: Convert to fraction form
    30,807.20/42,494.36 = 20,197.52/x
  3. Step 3: Cross multiply
    30,807.20x = 42,494.36 × 20,197.52
  4. Step 4: Simplify right side
    30,807.20x = 858,280,524.01
  5. Step 5: Solve for x
    x = 858,280,524.01/30,807.20
  6. Step 6: Final answer
    x = 27,859.74

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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.