Home / 38,690.21-53,395.72-21,694.18

Finding the Fourth Proportional to 38,690.21, 53,395.72 and 21,694.18

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Solution

The fourth proportional to 38,690.21, 53,395.72 and 21,694.18 is: 29,939.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,690.21 : 53,395.72 = 21,694.18 : x
  2. Step 2: Convert to fraction form
    38,690.21/53,395.72 = 21,694.18/x
  3. Step 3: Cross multiply
    38,690.21x = 53,395.72 × 21,694.18
  4. Step 4: Simplify right side
    38,690.21x = 1,158,376,173.18
  5. Step 5: Solve for x
    x = 1,158,376,173.18/38,690.21
  6. Step 6: Final answer
    x = 29,939.78

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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.