Home / 21,845.12-30,136.76-13,883.08

Finding the Fourth Proportional to 21,845.12, 30,136.76 and 13,883.08

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Solution

The fourth proportional to 21,845.12, 30,136.76 and 13,883.08 is: 19,152.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,845.12 : 30,136.76 = 13,883.08 : x
  2. Step 2: Convert to fraction form
    21,845.12/30,136.76 = 13,883.08/x
  3. Step 3: Cross multiply
    21,845.12x = 30,136.76 × 13,883.08
  4. Step 4: Simplify right side
    21,845.12x = 418,391,050.02
  5. Step 5: Solve for x
    x = 418,391,050.02/21,845.12
  6. Step 6: Final answer
    x = 19,152.61

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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.