Home / 30,421.55-45,601.27-20,561.83

Finding the Fourth Proportional to 30,421.55, 45,601.27 and 20,561.83

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Solution

The fourth proportional to 30,421.55, 45,601.27 and 20,561.83 is: 30,821.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,421.55 : 45,601.27 = 20,561.83 : x
  2. Step 2: Convert to fraction form
    30,421.55/45,601.27 = 20,561.83/x
  3. Step 3: Cross multiply
    30,421.55x = 45,601.27 × 20,561.83
  4. Step 4: Simplify right side
    30,421.55x = 937,645,561.52
  5. Step 5: Solve for x
    x = 937,645,561.52/30,421.55
  6. Step 6: Final answer
    x = 30,821.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.