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Finding the Fourth Proportional to 19,117.44, 28,665 and 7,416.99

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Solution

The fourth proportional to 19,117.44, 28,665 and 7,416.99 is: 11,121.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,117.44 : 28,665 = 7,416.99 : x
  2. Step 2: Convert to fraction form
    19,117.44/28,665 = 7,416.99/x
  3. Step 3: Cross multiply
    19,117.44x = 28,665 × 7,416.99
  4. Step 4: Simplify right side
    19,117.44x = 212,608,018.35
  5. Step 5: Solve for x
    x = 212,608,018.35/19,117.44
  6. Step 6: Final answer
    x = 11,121.16

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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.