Home / 13,117.89-18,102.78-7,149.54

Finding the Fourth Proportional to 13,117.89, 18,102.78 and 7,149.54

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Solution

The fourth proportional to 13,117.89, 18,102.78 and 7,149.54 is: 9,866.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,117.89 : 18,102.78 = 7,149.54 : x
  2. Step 2: Convert to fraction form
    13,117.89/18,102.78 = 7,149.54/x
  3. Step 3: Cross multiply
    13,117.89x = 18,102.78 × 7,149.54
  4. Step 4: Simplify right side
    13,117.89x = 129,426,513.97
  5. Step 5: Solve for x
    x = 129,426,513.97/13,117.89
  6. Step 6: Final answer
    x = 9,866.41

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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.