Home / 21,742.40-30,004.44-12,311.12

Finding the Fourth Proportional to 21,742.40, 30,004.44 and 12,311.12

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Solution

The fourth proportional to 21,742.40, 30,004.44 and 12,311.12 is: 16,989.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,742.40 : 30,004.44 = 12,311.12 : x
  2. Step 2: Convert to fraction form
    21,742.40/30,004.44 = 12,311.12/x
  3. Step 3: Cross multiply
    21,742.40x = 30,004.44 × 12,311.12
  4. Step 4: Simplify right side
    21,742.40x = 369,388,261.37
  5. Step 5: Solve for x
    x = 369,388,261.37/21,742.40
  6. Step 6: Final answer
    x = 16,989.30

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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.