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Finding the Fourth Proportional to 20,309.00, 30,428.64 and 18,254.66

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Solution

The fourth proportional to 20,309.00, 30,428.64 and 18,254.66 is: 27,350.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,309.00 : 30,428.64 = 18,254.66 : x
  2. Step 2: Convert to fraction form
    20,309.00/30,428.64 = 18,254.66/x
  3. Step 3: Cross multiply
    20,309.00x = 30,428.64 × 18,254.66
  4. Step 4: Simplify right side
    20,309.00x = 555,464,325.32
  5. Step 5: Solve for x
    x = 555,464,325.32/20,309.00
  6. Step 6: Final answer
    x = 27,350.66

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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.