Home / 21,369.20-32,015.40-18,911.60

Finding the Fourth Proportional to 21,369.20, 32,015.40 and 18,911.60

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Solution

The fourth proportional to 21,369.20, 32,015.40 and 18,911.60 is: 28,333.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,369.20 : 32,015.40 = 18,911.60 : x
  2. Step 2: Convert to fraction form
    21,369.20/32,015.40 = 18,911.60/x
  3. Step 3: Cross multiply
    21,369.20x = 32,015.40 × 18,911.60
  4. Step 4: Simplify right side
    21,369.20x = 605,462,438.64
  5. Step 5: Solve for x
    x = 605,462,438.64/21,369.20
  6. Step 6: Final answer
    x = 28,333.42

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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.