Home / 38,640.12-53,322.74-21,644.30

Finding the Fourth Proportional to 38,640.12, 53,322.74 and 21,644.30

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Solution

The fourth proportional to 38,640.12, 53,322.74 and 21,644.30 is: 29,868.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,640.12 : 53,322.74 = 21,644.30 : x
  2. Step 2: Convert to fraction form
    38,640.12/53,322.74 = 21,644.30/x
  3. Step 3: Cross multiply
    38,640.12x = 53,322.74 × 21,644.30
  4. Step 4: Simplify right side
    38,640.12x = 1,154,133,487.63
  5. Step 5: Solve for x
    x = 1,154,133,487.63/38,640.12
  6. Step 6: Final answer
    x = 29,868.79

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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.