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Finding the Fourth Proportional to 20,396.76, 30,603.30 and 9,308.64

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Solution

The fourth proportional to 20,396.76, 30,603.30 and 9,308.64 is: 13,966.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,396.76 : 30,603.30 = 9,308.64 : x
  2. Step 2: Convert to fraction form
    20,396.76/30,603.30 = 9,308.64/x
  3. Step 3: Cross multiply
    20,396.76x = 30,603.30 × 9,308.64
  4. Step 4: Simplify right side
    20,396.76x = 284,875,102.51
  5. Step 5: Solve for x
    x = 284,875,102.51/20,396.76
  6. Step 6: Final answer
    x = 13,966.68

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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.