Home / 12,421.85-18,632.90-3,656.93

Finding the Fourth Proportional to 12,421.85, 18,632.90 and 3,656.93

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Solution

The fourth proportional to 12,421.85, 18,632.90 and 3,656.93 is: 5,485.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.85 : 18,632.90 = 3,656.93 : x
  2. Step 2: Convert to fraction form
    12,421.85/18,632.90 = 3,656.93/x
  3. Step 3: Cross multiply
    12,421.85x = 18,632.90 × 3,656.93
  4. Step 4: Simplify right side
    12,421.85x = 68,139,126.97
  5. Step 5: Solve for x
    x = 68,139,126.97/12,421.85
  6. Step 6: Final answer
    x = 5,485.43

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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.