Home / 38,670.87-53,370.21-21,679.69

Finding the Fourth Proportional to 38,670.87, 53,370.21 and 21,679.69

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Solution

The fourth proportional to 38,670.87, 53,370.21 and 21,679.69 is: 29,920.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,670.87 : 53,370.21 = 21,679.69 : x
  2. Step 2: Convert to fraction form
    38,670.87/53,370.21 = 21,679.69/x
  3. Step 3: Cross multiply
    38,670.87x = 53,370.21 × 21,679.69
  4. Step 4: Simplify right side
    38,670.87x = 1,157,049,608.03
  5. Step 5: Solve for x
    x = 1,157,049,608.03/38,670.87
  6. Step 6: Final answer
    x = 29,920.44

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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.