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Finding the Fourth Proportional to 14,518.90, 21,780.28 and 4,654.90

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Solution

The fourth proportional to 14,518.90, 21,780.28 and 4,654.90 is: 6,982.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,518.90 : 21,780.28 = 4,654.90 : x
  2. Step 2: Convert to fraction form
    14,518.90/21,780.28 = 4,654.90/x
  3. Step 3: Cross multiply
    14,518.90x = 21,780.28 × 4,654.90
  4. Step 4: Simplify right side
    14,518.90x = 101,385,025.37
  5. Step 5: Solve for x
    x = 101,385,025.37/14,518.90
  6. Step 6: Final answer
    x = 6,982.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.