Home / 30,449.90-42,021.09-17,021.70

Finding the Fourth Proportional to 30,449.90, 42,021.09 and 17,021.70

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Solution

The fourth proportional to 30,449.90, 42,021.09 and 17,021.70 is: 23,490.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,449.90 : 42,021.09 = 17,021.70 : x
  2. Step 2: Convert to fraction form
    30,449.90/42,021.09 = 17,021.70/x
  3. Step 3: Cross multiply
    30,449.90x = 42,021.09 × 17,021.70
  4. Step 4: Simplify right side
    30,449.90x = 715,270,387.65
  5. Step 5: Solve for x
    x = 715,270,387.65/30,449.90
  6. Step 6: Final answer
    x = 23,490.07

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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.