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Finding the Fourth Proportional to 20,090.70, 30,118.30 and 7,602.05

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Solution

The fourth proportional to 20,090.70, 30,118.30 and 7,602.05 is: 11,396.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,090.70 : 30,118.30 = 7,602.05 : x
  2. Step 2: Convert to fraction form
    20,090.70/30,118.30 = 7,602.05/x
  3. Step 3: Cross multiply
    20,090.70x = 30,118.30 × 7,602.05
  4. Step 4: Simplify right side
    20,090.70x = 228,960,878.81
  5. Step 5: Solve for x
    x = 228,960,878.81/20,090.70
  6. Step 6: Final answer
    x = 11,396.36

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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.