Home / 13,111.80-19,638.90-7,908.60

Finding the Fourth Proportional to 13,111.80, 19,638.90 and 7,908.60

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Solution

The fourth proportional to 13,111.80, 19,638.90 and 7,908.60 is: 11,845.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,111.80 : 19,638.90 = 7,908.60 : x
  2. Step 2: Convert to fraction form
    13,111.80/19,638.90 = 7,908.60/x
  3. Step 3: Cross multiply
    13,111.80x = 19,638.90 × 7,908.60
  4. Step 4: Simplify right side
    13,111.80x = 155,316,204.54
  5. Step 5: Solve for x
    x = 155,316,204.54/13,111.80
  6. Step 6: Final answer
    x = 11,845.53

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1.5x scale

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.