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Finding the Fourth Proportional to 19,575.60, 27,016.92 and 13,290

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Solution

The fourth proportional to 19,575.60, 27,016.92 and 13,290 is: 18,341.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,575.60 : 27,016.92 = 13,290 : x
  2. Step 2: Convert to fraction form
    19,575.60/27,016.92 = 13,290/x
  3. Step 3: Cross multiply
    19,575.60x = 27,016.92 × 13,290
  4. Step 4: Simplify right side
    19,575.60x = 359,054,866.80
  5. Step 5: Solve for x
    x = 359,054,866.80/19,575.60
  6. Step 6: Final answer
    x = 18,341.96

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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.