Home / 27,820.75-38,405.94-15,881.78

Finding the Fourth Proportional to 27,820.75, 38,405.94 and 15,881.78

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Solution

The fourth proportional to 27,820.75, 38,405.94 and 15,881.78 is: 21,924.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,820.75 : 38,405.94 = 15,881.78 : x
  2. Step 2: Convert to fraction form
    27,820.75/38,405.94 = 15,881.78/x
  3. Step 3: Cross multiply
    27,820.75x = 38,405.94 × 15,881.78
  4. Step 4: Simplify right side
    27,820.75x = 609,954,825.49
  5. Step 5: Solve for x
    x = 609,954,825.49/27,820.75
  6. Step 6: Final answer
    x = 21,924.45

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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.