Home / 38,643.48-53,330-21,646.73

Finding the Fourth Proportional to 38,643.48, 53,330 and 21,646.73

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Solution

The fourth proportional to 38,643.48, 53,330 and 21,646.73 is: 29,873.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,643.48 : 53,330 = 21,646.73 : x
  2. Step 2: Convert to fraction form
    38,643.48/53,330 = 21,646.73/x
  3. Step 3: Cross multiply
    38,643.48x = 53,330 × 21,646.73
  4. Step 4: Simplify right side
    38,643.48x = 1,154,420,110.90
  5. Step 5: Solve for x
    x = 1,154,420,110.90/38,643.48
  6. Step 6: Final answer
    x = 29,873.61

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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.