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Finding the Fourth Proportional to 20,352, 28,080.90 and 11,848.89

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Solution

The fourth proportional to 20,352, 28,080.90 and 11,848.89 is: 16,348.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,352 : 28,080.90 = 11,848.89 : x
  2. Step 2: Convert to fraction form
    20,352/28,080.90 = 11,848.89/x
  3. Step 3: Cross multiply
    20,352x = 28,080.90 × 11,848.89
  4. Step 4: Simplify right side
    20,352x = 332,727,495.20
  5. Step 5: Solve for x
    x = 332,727,495.20/20,352
  6. Step 6: Final answer
    x = 16,348.64

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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.