Home / 13,340.19-20,021.78-7,422.99

Finding the Fourth Proportional to 13,340.19, 20,021.78 and 7,422.99

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Solution

The fourth proportional to 13,340.19, 20,021.78 and 7,422.99 is: 11,140.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,340.19 : 20,021.78 = 7,422.99 : x
  2. Step 2: Convert to fraction form
    13,340.19/20,021.78 = 7,422.99/x
  3. Step 3: Cross multiply
    13,340.19x = 20,021.78 × 7,422.99
  4. Step 4: Simplify right side
    13,340.19x = 148,621,528.82
  5. Step 5: Solve for x
    x = 148,621,528.82/13,340.19
  6. Step 6: Final answer
    x = 11,140.88

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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.