Home / 12,431.40-17,165.70-8,258.28

Finding the Fourth Proportional to 12,431.40, 17,165.70 and 8,258.28

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Solution

The fourth proportional to 12,431.40, 17,165.70 and 8,258.28 is: 11,403.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,431.40 : 17,165.70 = 8,258.28 : x
  2. Step 2: Convert to fraction form
    12,431.40/17,165.70 = 8,258.28/x
  3. Step 3: Cross multiply
    12,431.40x = 17,165.70 × 8,258.28
  4. Step 4: Simplify right side
    12,431.40x = 141,759,157.00
  5. Step 5: Solve for x
    x = 141,759,157.00/12,431.40
  6. Step 6: Final answer
    x = 11,403.31

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Half scale
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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.