Home / 13,780.46-19,016.66-7,812.38

Finding the Fourth Proportional to 13,780.46, 19,016.66 and 7,812.38

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Solution

The fourth proportional to 13,780.46, 19,016.66 and 7,812.38 is: 10,780.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.46 : 19,016.66 = 7,812.38 : x
  2. Step 2: Convert to fraction form
    13,780.46/19,016.66 = 7,812.38/x
  3. Step 3: Cross multiply
    13,780.46x = 19,016.66 × 7,812.38
  4. Step 4: Simplify right side
    13,780.46x = 148,565,441.32
  5. Step 5: Solve for x
    x = 148,565,441.32/13,780.46
  6. Step 6: Final answer
    x = 10,780.87

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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.