Home / 30,685.23-42,340.32-17,255.43

Finding the Fourth Proportional to 30,685.23, 42,340.32 and 17,255.43

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Solution

The fourth proportional to 30,685.23, 42,340.32 and 17,255.43 is: 23,809.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,685.23 : 42,340.32 = 17,255.43 : x
  2. Step 2: Convert to fraction form
    30,685.23/42,340.32 = 17,255.43/x
  3. Step 3: Cross multiply
    30,685.23x = 42,340.32 × 17,255.43
  4. Step 4: Simplify right side
    30,685.23x = 730,600,427.94
  5. Step 5: Solve for x
    x = 730,600,427.94/30,685.23
  6. Step 6: Final answer
    x = 23,809.51

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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.