Home / 13,825.49-19,078.54-7,775.39

Finding the Fourth Proportional to 13,825.49, 19,078.54 and 7,775.39

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Solution

The fourth proportional to 13,825.49, 19,078.54 and 7,775.39 is: 10,729.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,825.49 : 19,078.54 = 7,775.39 : x
  2. Step 2: Convert to fraction form
    13,825.49/19,078.54 = 7,775.39/x
  3. Step 3: Cross multiply
    13,825.49x = 19,078.54 × 7,775.39
  4. Step 4: Simplify right side
    13,825.49x = 148,343,117.39
  5. Step 5: Solve for x
    x = 148,343,117.39/13,825.49
  6. Step 6: Final answer
    x = 10,729.69

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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.