Home / 30,640.23-42,282.39-18,723.51

Finding the Fourth Proportional to 30,640.23, 42,282.39 and 18,723.51

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Solution

The fourth proportional to 30,640.23, 42,282.39 and 18,723.51 is: 25,837.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,640.23 : 42,282.39 = 18,723.51 : x
  2. Step 2: Convert to fraction form
    30,640.23/42,282.39 = 18,723.51/x
  3. Step 3: Cross multiply
    30,640.23x = 42,282.39 × 18,723.51
  4. Step 4: Simplify right side
    30,640.23x = 791,674,751.99
  5. Step 5: Solve for x
    x = 791,674,751.99/30,640.23
  6. Step 6: Final answer
    x = 25,837.75

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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.