Home / 38,781.14-53,521-21,786.52

Finding the Fourth Proportional to 38,781.14, 53,521 and 21,786.52

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Solution

The fourth proportional to 38,781.14, 53,521 and 21,786.52 is: 30,067.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,781.14 : 53,521 = 21,786.52 : x
  2. Step 2: Convert to fraction form
    38,781.14/53,521 = 21,786.52/x
  3. Step 3: Cross multiply
    38,781.14x = 53,521 × 21,786.52
  4. Step 4: Simplify right side
    38,781.14x = 1,166,036,336.92
  5. Step 5: Solve for x
    x = 1,166,036,336.92/38,781.14
  6. Step 6: Final answer
    x = 30,067.10

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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.