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Finding the Fourth Proportional to 19,388.64, 29,047.68 and 18,668.64

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Solution

The fourth proportional to 19,388.64, 29,047.68 and 18,668.64 is: 27,968.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,388.64 : 29,047.68 = 18,668.64 : x
  2. Step 2: Convert to fraction form
    19,388.64/29,047.68 = 18,668.64/x
  3. Step 3: Cross multiply
    19,388.64x = 29,047.68 × 18,668.64
  4. Step 4: Simplify right side
    19,388.64x = 542,280,680.76
  5. Step 5: Solve for x
    x = 542,280,680.76/19,388.64
  6. Step 6: Final answer
    x = 27,968.99

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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.