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Finding the Fourth Proportional to 27,849.60, 38,415.60 and 18,421.20

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Solution

The fourth proportional to 27,849.60, 38,415.60 and 18,421.20 is: 25,410.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,849.60 : 38,415.60 = 18,421.20 : x
  2. Step 2: Convert to fraction form
    27,849.60/38,415.60 = 18,421.20/x
  3. Step 3: Cross multiply
    27,849.60x = 38,415.60 × 18,421.20
  4. Step 4: Simplify right side
    27,849.60x = 707,661,450.72
  5. Step 5: Solve for x
    x = 707,661,450.72/27,849.60
  6. Step 6: Final answer
    x = 25,410.11

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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.