Home / 20,255.12-30,383.76-19,147.04

Finding the Fourth Proportional to 20,255.12, 30,383.76 and 19,147.04

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Solution

The fourth proportional to 20,255.12, 30,383.76 and 19,147.04 is: 28,721.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,255.12 : 30,383.76 = 19,147.04 : x
  2. Step 2: Convert to fraction form
    20,255.12/30,383.76 = 19,147.04/x
  3. Step 3: Cross multiply
    20,255.12x = 30,383.76 × 19,147.04
  4. Step 4: Simplify right side
    20,255.12x = 581,759,068.07
  5. Step 5: Solve for x
    x = 581,759,068.07/20,255.12
  6. Step 6: Final answer
    x = 28,721.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.