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Finding the Fourth Proportional to 13,783.77, 19,022.03 and 7,815.69

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Solution

The fourth proportional to 13,783.77, 19,022.03 and 7,815.69 is: 10,785.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,783.77 : 19,022.03 = 7,815.69 : x
  2. Step 2: Convert to fraction form
    13,783.77/19,022.03 = 7,815.69/x
  3. Step 3: Cross multiply
    13,783.77x = 19,022.03 × 7,815.69
  4. Step 4: Simplify right side
    13,783.77x = 148,670,250.57
  5. Step 5: Solve for x
    x = 148,670,250.57/13,783.77
  6. Step 6: Final answer
    x = 10,785.89

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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.