Home / 12,840.36-17,719.48-7,175.19

Finding the Fourth Proportional to 12,840.36, 17,719.48 and 7,175.19

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Solution

The fourth proportional to 12,840.36, 17,719.48 and 7,175.19 is: 9,901.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,840.36 : 17,719.48 = 7,175.19 : x
  2. Step 2: Convert to fraction form
    12,840.36/17,719.48 = 7,175.19/x
  3. Step 3: Cross multiply
    12,840.36x = 17,719.48 × 7,175.19
  4. Step 4: Simplify right side
    12,840.36x = 127,140,635.70
  5. Step 5: Solve for x
    x = 127,140,635.70/12,840.36
  6. Step 6: Final answer
    x = 9,901.64

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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.