Home / 8,781.35-13,172.75-2,938.01

Finding the Fourth Proportional to 8,781.35, 13,172.75 and 2,938.01

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Solution

The fourth proportional to 8,781.35, 13,172.75 and 2,938.01 is: 4,407.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.35 : 13,172.75 = 2,938.01 : x
  2. Step 2: Convert to fraction form
    8,781.35/13,172.75 = 2,938.01/x
  3. Step 3: Cross multiply
    8,781.35x = 13,172.75 × 2,938.01
  4. Step 4: Simplify right side
    8,781.35x = 38,701,656.54
  5. Step 5: Solve for x
    x = 38,701,656.54/8,781.35
  6. Step 6: Final answer
    x = 4,407.26

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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.