Home / 21,744.80-30,009.68-12,315.04

Finding the Fourth Proportional to 21,744.80, 30,009.68 and 12,315.04

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Solution

The fourth proportional to 21,744.80, 30,009.68 and 12,315.04 is: 16,995.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,744.80 : 30,009.68 = 12,315.04 : x
  2. Step 2: Convert to fraction form
    21,744.80/30,009.68 = 12,315.04/x
  3. Step 3: Cross multiply
    21,744.80x = 30,009.68 × 12,315.04
  4. Step 4: Simplify right side
    21,744.80x = 369,570,409.59
  5. Step 5: Solve for x
    x = 369,570,409.59/21,744.80
  6. Step 6: Final answer
    x = 16,995.81

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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.