Home / 12,380.40-17,087.32-9,686.26

Finding the Fourth Proportional to 12,380.40, 17,087.32 and 9,686.26

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Solution

The fourth proportional to 12,380.40, 17,087.32 and 9,686.26 is: 13,368.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,380.40 : 17,087.32 = 9,686.26 : x
  2. Step 2: Convert to fraction form
    12,380.40/17,087.32 = 9,686.26/x
  3. Step 3: Cross multiply
    12,380.40x = 17,087.32 × 9,686.26
  4. Step 4: Simplify right side
    12,380.40x = 165,512,224.22
  5. Step 5: Solve for x
    x = 165,512,224.22/12,380.40
  6. Step 6: Final answer
    x = 13,368.89

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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.