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Finding the Fourth Proportional to 27,765.58, 38,318.58 and 15,829.20

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Solution

The fourth proportional to 27,765.58, 38,318.58 and 15,829.20 is: 21,845.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,765.58 : 38,318.58 = 15,829.20 : x
  2. Step 2: Convert to fraction form
    27,765.58/38,318.58 = 15,829.20/x
  3. Step 3: Cross multiply
    27,765.58x = 38,318.58 × 15,829.20
  4. Step 4: Simplify right side
    27,765.58x = 606,552,466.54
  5. Step 5: Solve for x
    x = 606,552,466.54/27,765.58
  6. Step 6: Final answer
    x = 21,845.48

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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.