Home / 38,815.55-53,571.12-21,821.20

Finding the Fourth Proportional to 38,815.55, 53,571.12 and 21,821.20

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Solution

The fourth proportional to 38,815.55, 53,571.12 and 21,821.20 is: 30,116.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,815.55 : 53,571.12 = 21,821.20 : x
  2. Step 2: Convert to fraction form
    38,815.55/53,571.12 = 21,821.20/x
  3. Step 3: Cross multiply
    38,815.55x = 53,571.12 × 21,821.20
  4. Step 4: Simplify right side
    38,815.55x = 1,168,985,855.89
  5. Step 5: Solve for x
    x = 1,168,985,855.89/38,815.55
  6. Step 6: Final answer
    x = 30,116.43

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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.