Home / 30,655.72-45,986.82-13,120.84

Finding the Fourth Proportional to 30,655.72, 45,986.82 and 13,120.84

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Solution

The fourth proportional to 30,655.72, 45,986.82 and 13,120.84 is: 19,682.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,655.72 : 45,986.82 = 13,120.84 : x
  2. Step 2: Convert to fraction form
    30,655.72/45,986.82 = 13,120.84/x
  3. Step 3: Cross multiply
    30,655.72x = 45,986.82 × 13,120.84
  4. Step 4: Simplify right side
    30,655.72x = 603,385,707.33
  5. Step 5: Solve for x
    x = 603,385,707.33/30,655.72
  6. Step 6: Final answer
    x = 19,682.65

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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.