Home / 30,806.51-42,450.21-21,249.32

Finding the Fourth Proportional to 30,806.51, 42,450.21 and 21,249.32

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Solution

The fourth proportional to 30,806.51, 42,450.21 and 21,249.32 is: 29,280.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,806.51 : 42,450.21 = 21,249.32 : x
  2. Step 2: Convert to fraction form
    30,806.51/42,450.21 = 21,249.32/x
  3. Step 3: Cross multiply
    30,806.51x = 42,450.21 × 21,249.32
  4. Step 4: Simplify right side
    30,806.51x = 902,037,884.11
  5. Step 5: Solve for x
    x = 902,037,884.11/30,806.51
  6. Step 6: Final answer
    x = 29,280.76

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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.