Home / 9,930.24-13,720.32-8,271.36

Finding the Fourth Proportional to 9,930.24, 13,720.32 and 8,271.36

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Solution

The fourth proportional to 9,930.24, 13,720.32 and 8,271.36 is: 11,428.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,930.24 : 13,720.32 = 8,271.36 : x
  2. Step 2: Convert to fraction form
    9,930.24/13,720.32 = 8,271.36/x
  3. Step 3: Cross multiply
    9,930.24x = 13,720.32 × 8,271.36
  4. Step 4: Simplify right side
    9,930.24x = 113,485,706.04
  5. Step 5: Solve for x
    x = 113,485,706.04/9,930.24
  6. Step 6: Final answer
    x = 11,428.29

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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.