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Finding the Fourth Proportional to 19,489.40, 29,234.10 and 18,913.40

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Solution

The fourth proportional to 19,489.40, 29,234.10 and 18,913.40 is: 28,370.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,489.40 : 29,234.10 = 18,913.40 : x
  2. Step 2: Convert to fraction form
    19,489.40/29,234.10 = 18,913.40/x
  3. Step 3: Cross multiply
    19,489.40x = 29,234.10 × 18,913.40
  4. Step 4: Simplify right side
    19,489.40x = 552,916,226.94
  5. Step 5: Solve for x
    x = 552,916,226.94/19,489.40
  6. Step 6: Final answer
    x = 28,370.10

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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.