Home / 27,812.69-38,383.13-15,879.77

Finding the Fourth Proportional to 27,812.69, 38,383.13 and 15,879.77

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Solution

The fourth proportional to 27,812.69, 38,383.13 and 15,879.77 is: 21,915.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,812.69 : 38,383.13 = 15,879.77 : x
  2. Step 2: Convert to fraction form
    27,812.69/38,383.13 = 15,879.77/x
  3. Step 3: Cross multiply
    27,812.69x = 38,383.13 × 15,879.77
  4. Step 4: Simplify right side
    27,812.69x = 609,515,276.28
  5. Step 5: Solve for x
    x = 609,515,276.28/27,812.69
  6. Step 6: Final answer
    x = 21,915.01

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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.