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Finding the Fourth Proportional to 27,520.21, 37,978.04 and 15,585.87

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Solution

The fourth proportional to 27,520.21, 37,978.04 and 15,585.87 is: 21,508.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,520.21 : 37,978.04 = 15,585.87 : x
  2. Step 2: Convert to fraction form
    27,520.21/37,978.04 = 15,585.87/x
  3. Step 3: Cross multiply
    27,520.21x = 37,978.04 × 15,585.87
  4. Step 4: Simplify right side
    27,520.21x = 591,920,716.37
  5. Step 5: Solve for x
    x = 591,920,716.37/27,520.21
  6. Step 6: Final answer
    x = 21,508.58

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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.