Home / 13,775.31-19,010.33-7,806.78

Finding the Fourth Proportional to 13,775.31, 19,010.33 and 7,806.78

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Solution

The fourth proportional to 13,775.31, 19,010.33 and 7,806.78 is: 10,773.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,775.31 : 19,010.33 = 7,806.78 : x
  2. Step 2: Convert to fraction form
    13,775.31/19,010.33 = 7,806.78/x
  3. Step 3: Cross multiply
    13,775.31x = 19,010.33 × 7,806.78
  4. Step 4: Simplify right side
    13,775.31x = 148,409,454.28
  5. Step 5: Solve for x
    x = 148,409,454.28/13,775.31
  6. Step 6: Final answer
    x = 10,773.58

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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.