Home / 30,830.04-42,563.76-20,238.24

Finding the Fourth Proportional to 30,830.04, 42,563.76 and 20,238.24

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Solution

The fourth proportional to 30,830.04, 42,563.76 and 20,238.24 is: 27,940.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,830.04 : 42,563.76 = 20,238.24 : x
  2. Step 2: Convert to fraction form
    30,830.04/42,563.76 = 20,238.24/x
  3. Step 3: Cross multiply
    30,830.04x = 42,563.76 × 20,238.24
  4. Step 4: Simplify right side
    30,830.04x = 861,415,590.18
  5. Step 5: Solve for x
    x = 861,415,590.18/30,830.04
  6. Step 6: Final answer
    x = 27,940.79

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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.