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Finding the Fourth Proportional to 18,199.80, 25,421.40 and 18,199.80

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Solution

The fourth proportional to 18,199.80, 25,421.40 and 18,199.80 is: 25,421.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,199.80 : 25,421.40 = 18,199.80 : x
  2. Step 2: Convert to fraction form
    18,199.80/25,421.40 = 18,199.80/x
  3. Step 3: Cross multiply
    18,199.80x = 25,421.40 × 18,199.80
  4. Step 4: Simplify right side
    18,199.80x = 462,664,395.72
  5. Step 5: Solve for x
    x = 462,664,395.72/18,199.80
  6. Step 6: Final answer
    x = 25,421.40

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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.