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Finding the Fourth Proportional to 19,636.71, 29,459.93 and 6,489.20

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Solution

The fourth proportional to 19,636.71, 29,459.93 and 6,489.20 is: 9,735.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,636.71 : 29,459.93 = 6,489.20 : x
  2. Step 2: Convert to fraction form
    19,636.71/29,459.93 = 6,489.20/x
  3. Step 3: Cross multiply
    19,636.71x = 29,459.93 × 6,489.20
  4. Step 4: Simplify right side
    19,636.71x = 191,171,198.01
  5. Step 5: Solve for x
    x = 191,171,198.01/19,636.71
  6. Step 6: Final answer
    x = 9,735.40

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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.