Home / 30,771.64-42,448.58-21,195.05

Finding the Fourth Proportional to 30,771.64, 42,448.58 and 21,195.05

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Solution

The fourth proportional to 30,771.64, 42,448.58 and 21,195.05 is: 29,237.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,771.64 : 42,448.58 = 21,195.05 : x
  2. Step 2: Convert to fraction form
    30,771.64/42,448.58 = 21,195.05/x
  3. Step 3: Cross multiply
    30,771.64x = 42,448.58 × 21,195.05
  4. Step 4: Simplify right side
    30,771.64x = 899,699,775.68
  5. Step 5: Solve for x
    x = 899,699,775.68/30,771.64
  6. Step 6: Final answer
    x = 29,237.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.