Home / 13,780.06-19,016.96-7,811.66

Finding the Fourth Proportional to 13,780.06, 19,016.96 and 7,811.66

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Solution

The fourth proportional to 13,780.06, 19,016.96 and 7,811.66 is: 10,780.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.06 : 19,016.96 = 7,811.66 : x
  2. Step 2: Convert to fraction form
    13,780.06/19,016.96 = 7,811.66/x
  3. Step 3: Cross multiply
    13,780.06x = 19,016.96 × 7,811.66
  4. Step 4: Simplify right side
    13,780.06x = 148,554,034.24
  5. Step 5: Solve for x
    x = 148,554,034.24/13,780.06
  6. Step 6: Final answer
    x = 10,780.36

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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.