Home / 27,815.82-38,389.06-15,880.88

Finding the Fourth Proportional to 27,815.82, 38,389.06 and 15,880.88

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Solution

The fourth proportional to 27,815.82, 38,389.06 and 15,880.88 is: 21,917.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,815.82 : 38,389.06 = 15,880.88 : x
  2. Step 2: Convert to fraction form
    27,815.82/38,389.06 = 15,880.88/x
  3. Step 3: Cross multiply
    27,815.82x = 38,389.06 × 15,880.88
  4. Step 4: Simplify right side
    27,815.82x = 609,652,055.17
  5. Step 5: Solve for x
    x = 609,652,055.17/27,815.82
  6. Step 6: Final answer
    x = 21,917.46

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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.