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Finding the Fourth Proportional to 20,699.36, 30,890.02 and 18,484.96

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Solution

The fourth proportional to 20,699.36, 30,890.02 and 18,484.96 is: 27,585.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,699.36 : 30,890.02 = 18,484.96 : x
  2. Step 2: Convert to fraction form
    20,699.36/30,890.02 = 18,484.96/x
  3. Step 3: Cross multiply
    20,699.36x = 30,890.02 × 18,484.96
  4. Step 4: Simplify right side
    20,699.36x = 571,000,784.10
  5. Step 5: Solve for x
    x = 571,000,784.10/20,699.36
  6. Step 6: Final answer
    x = 27,585.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.