Home / 13,780.56-19,016.07-7,813.14

Finding the Fourth Proportional to 13,780.56, 19,016.07 and 7,813.14

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Solution

The fourth proportional to 13,780.56, 19,016.07 and 7,813.14 is: 10,781.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.56 : 19,016.07 = 7,813.14 : x
  2. Step 2: Convert to fraction form
    13,780.56/19,016.07 = 7,813.14/x
  3. Step 3: Cross multiply
    13,780.56x = 19,016.07 × 7,813.14
  4. Step 4: Simplify right side
    13,780.56x = 148,575,217.16
  5. Step 5: Solve for x
    x = 148,575,217.16/13,780.56
  6. Step 6: Final answer
    x = 10,781.51

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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.