Home / 7,128.36-10,686.06-4,815

Finding the Fourth Proportional to 7,128.36, 10,686.06 and 4,815

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Solution

The fourth proportional to 7,128.36, 10,686.06 and 4,815 is: 7,218.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.36 : 10,686.06 = 4,815 : x
  2. Step 2: Convert to fraction form
    7,128.36/10,686.06 = 4,815/x
  3. Step 3: Cross multiply
    7,128.36x = 10,686.06 × 4,815
  4. Step 4: Simplify right side
    7,128.36x = 51,453,378.90
  5. Step 5: Solve for x
    x = 51,453,378.90/7,128.36
  6. Step 6: Final answer
    x = 7,218.12

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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.