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Finding the Fourth Proportional to 19,188.16, 28,777.74 and 7,339.48

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Solution

The fourth proportional to 19,188.16, 28,777.74 and 7,339.48 is: 11,007.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,188.16 : 28,777.74 = 7,339.48 : x
  2. Step 2: Convert to fraction form
    19,188.16/28,777.74 = 7,339.48/x
  3. Step 3: Cross multiply
    19,188.16x = 28,777.74 × 7,339.48
  4. Step 4: Simplify right side
    19,188.16x = 211,213,647.18
  5. Step 5: Solve for x
    x = 211,213,647.18/19,188.16
  6. Step 6: Final answer
    x = 11,007.50

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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.