Home / 13,083.75-18,055.71-7,115.49

Finding the Fourth Proportional to 13,083.75, 18,055.71 and 7,115.49

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Solution

The fourth proportional to 13,083.75, 18,055.71 and 7,115.49 is: 9,819.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,083.75 : 18,055.71 = 7,115.49 : x
  2. Step 2: Convert to fraction form
    13,083.75/18,055.71 = 7,115.49/x
  3. Step 3: Cross multiply
    13,083.75x = 18,055.71 × 7,115.49
  4. Step 4: Simplify right side
    13,083.75x = 128,475,223.95
  5. Step 5: Solve for x
    x = 128,475,223.95/13,083.75
  6. Step 6: Final answer
    x = 9,819.45

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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.