Home / 12,485.90-17,231.28-7,181.30

Finding the Fourth Proportional to 12,485.90, 17,231.28 and 7,181.30

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Solution

The fourth proportional to 12,485.90, 17,231.28 and 7,181.30 is: 9,910.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,485.90 : 17,231.28 = 7,181.30 : x
  2. Step 2: Convert to fraction form
    12,485.90/17,231.28 = 7,181.30/x
  3. Step 3: Cross multiply
    12,485.90x = 17,231.28 × 7,181.30
  4. Step 4: Simplify right side
    12,485.90x = 123,742,991.06
  5. Step 5: Solve for x
    x = 123,742,991.06/12,485.90
  6. Step 6: Final answer
    x = 9,910.62

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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.