Home / 13,128.84-19,684.55-6,881.31

Finding the Fourth Proportional to 13,128.84, 19,684.55 and 6,881.31

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Solution

The fourth proportional to 13,128.84, 19,684.55 and 6,881.31 is: 10,317.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.84 : 19,684.55 = 6,881.31 : x
  2. Step 2: Convert to fraction form
    13,128.84/19,684.55 = 6,881.31/x
  3. Step 3: Cross multiply
    13,128.84x = 19,684.55 × 6,881.31
  4. Step 4: Simplify right side
    13,128.84x = 135,455,507.96
  5. Step 5: Solve for x
    x = 135,455,507.96/13,128.84
  6. Step 6: Final answer
    x = 10,317.40

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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.