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Finding the Fourth Proportional to 15,489.86, 21,354.84 and 10,644.44

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Solution

The fourth proportional to 15,489.86, 21,354.84 and 10,644.44 is: 14,674.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.86 : 21,354.84 = 10,644.44 : x
  2. Step 2: Convert to fraction form
    15,489.86/21,354.84 = 10,644.44/x
  3. Step 3: Cross multiply
    15,489.86x = 21,354.84 × 10,644.44
  4. Step 4: Simplify right side
    15,489.86x = 227,310,206.32
  5. Step 5: Solve for x
    x = 227,310,206.32/15,489.86
  6. Step 6: Final answer
    x = 14,674.78

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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.