Home / 30,420.46-41,980.26-16,991.70

Finding the Fourth Proportional to 30,420.46, 41,980.26 and 16,991.70

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Solution

The fourth proportional to 30,420.46, 41,980.26 and 16,991.70 is: 23,448.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,420.46 : 41,980.26 = 16,991.70 : x
  2. Step 2: Convert to fraction form
    30,420.46/41,980.26 = 16,991.70/x
  3. Step 3: Cross multiply
    30,420.46x = 41,980.26 × 16,991.70
  4. Step 4: Simplify right side
    30,420.46x = 713,315,983.84
  5. Step 5: Solve for x
    x = 713,315,983.84/30,420.46
  6. Step 6: Final answer
    x = 23,448.56

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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.