Home / 8,322.36-12,485.40-3,128.28

Finding the Fourth Proportional to 8,322.36, 12,485.40 and 3,128.28

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Solution

The fourth proportional to 8,322.36, 12,485.40 and 3,128.28 is: 4,693.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,322.36 : 12,485.40 = 3,128.28 : x
  2. Step 2: Convert to fraction form
    8,322.36/12,485.40 = 3,128.28/x
  3. Step 3: Cross multiply
    8,322.36x = 12,485.40 × 3,128.28
  4. Step 4: Simplify right side
    8,322.36x = 39,057,827.11
  5. Step 5: Solve for x
    x = 39,057,827.11/8,322.36
  6. Step 6: Final answer
    x = 4,693.12

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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.