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Finding the Fourth Proportional to 19,191.94, 28,783.94 and 5,148.64

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Solution

The fourth proportional to 19,191.94, 28,783.94 and 5,148.64 is: 7,721.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,191.94 : 28,783.94 = 5,148.64 : x
  2. Step 2: Convert to fraction form
    19,191.94/28,783.94 = 5,148.64/x
  3. Step 3: Cross multiply
    19,191.94x = 28,783.94 × 5,148.64
  4. Step 4: Simplify right side
    19,191.94x = 148,197,993.17
  5. Step 5: Solve for x
    x = 148,197,993.17/19,191.94
  6. Step 6: Final answer
    x = 7,721.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.