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Finding the Fourth Proportional to 18,820.20, 26,406.60 and 18,820.20

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Solution

The fourth proportional to 18,820.20, 26,406.60 and 18,820.20 is: 26,406.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,820.20 : 26,406.60 = 18,820.20 : x
  2. Step 2: Convert to fraction form
    18,820.20/26,406.60 = 18,820.20/x
  3. Step 3: Cross multiply
    18,820.20x = 26,406.60 × 18,820.20
  4. Step 4: Simplify right side
    18,820.20x = 496,977,493.32
  5. Step 5: Solve for x
    x = 496,977,493.32/18,820.20
  6. Step 6: Final answer
    x = 26,406.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.