Home / 38,679.12-53,373.57-21,912.12

Finding the Fourth Proportional to 38,679.12, 53,373.57 and 21,912.12

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Solution

The fourth proportional to 38,679.12, 53,373.57 and 21,912.12 is: 30,236.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,679.12 : 53,373.57 = 21,912.12 : x
  2. Step 2: Convert to fraction form
    38,679.12/53,373.57 = 21,912.12/x
  3. Step 3: Cross multiply
    38,679.12x = 53,373.57 × 21,912.12
  4. Step 4: Simplify right side
    38,679.12x = 1,169,528,070.67
  5. Step 5: Solve for x
    x = 1,169,528,070.67/38,679.12
  6. Step 6: Final answer
    x = 30,236.68

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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.