Home / 13,205.21-18,223.20-7,901.29

Finding the Fourth Proportional to 13,205.21, 18,223.20 and 7,901.29

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Solution

The fourth proportional to 13,205.21, 18,223.20 and 7,901.29 is: 10,903.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,205.21 : 18,223.20 = 7,901.29 : x
  2. Step 2: Convert to fraction form
    13,205.21/18,223.20 = 7,901.29/x
  3. Step 3: Cross multiply
    13,205.21x = 18,223.20 × 7,901.29
  4. Step 4: Simplify right side
    13,205.21x = 143,986,696.81
  5. Step 5: Solve for x
    x = 143,986,696.81/13,205.21
  6. Step 6: Final answer
    x = 10,903.78

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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.