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Finding the Fourth Proportional to 19,990.56, 29,985.84 and 10,814.88

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Solution

The fourth proportional to 19,990.56, 29,985.84 and 10,814.88 is: 16,222.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,990.56 : 29,985.84 = 10,814.88 : x
  2. Step 2: Convert to fraction form
    19,990.56/29,985.84 = 10,814.88/x
  3. Step 3: Cross multiply
    19,990.56x = 29,985.84 × 10,814.88
  4. Step 4: Simplify right side
    19,990.56x = 324,293,261.30
  5. Step 5: Solve for x
    x = 324,293,261.30/19,990.56
  6. Step 6: Final answer
    x = 16,222.32

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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.