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Finding the Fourth Proportional to 11,898.40, 16,680.80 and 11,898.40

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Solution

The fourth proportional to 11,898.40, 16,680.80 and 11,898.40 is: 16,680.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,898.40 : 16,680.80 = 11,898.40 : x
  2. Step 2: Convert to fraction form
    11,898.40/16,680.80 = 11,898.40/x
  3. Step 3: Cross multiply
    11,898.40x = 16,680.80 × 11,898.40
  4. Step 4: Simplify right side
    11,898.40x = 198,474,830.72
  5. Step 5: Solve for x
    x = 198,474,830.72/11,898.40
  6. Step 6: Final answer
    x = 16,680.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.