Home / 27,821.72-38,430.78-20,735.84

Finding the Fourth Proportional to 27,821.72, 38,430.78 and 20,735.84

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Solution

The fourth proportional to 27,821.72, 38,430.78 and 20,735.84 is: 28,642.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,821.72 : 38,430.78 = 20,735.84 : x
  2. Step 2: Convert to fraction form
    27,821.72/38,430.78 = 20,735.84/x
  3. Step 3: Cross multiply
    27,821.72x = 38,430.78 × 20,735.84
  4. Step 4: Simplify right side
    27,821.72x = 796,894,505.16
  5. Step 5: Solve for x
    x = 796,894,505.16/27,821.72
  6. Step 6: Final answer
    x = 28,642.89

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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.