Home / 30,878.49-42,614.43-18,783.70

Finding the Fourth Proportional to 30,878.49, 42,614.43 and 18,783.70

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Solution

The fourth proportional to 30,878.49, 42,614.43 and 18,783.70 is: 25,922.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,878.49 : 42,614.43 = 18,783.70 : x
  2. Step 2: Convert to fraction form
    30,878.49/42,614.43 = 18,783.70/x
  3. Step 3: Cross multiply
    30,878.49x = 42,614.43 × 18,783.70
  4. Step 4: Simplify right side
    30,878.49x = 800,456,668.79
  5. Step 5: Solve for x
    x = 800,456,668.79/30,878.49
  6. Step 6: Final answer
    x = 25,922.79

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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.