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Finding the Fourth Proportional to 14,000.40, 21,000.60 and 8,087.40

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Solution

The fourth proportional to 14,000.40, 21,000.60 and 8,087.40 is: 12,131.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,000.40 : 21,000.60 = 8,087.40 : x
  2. Step 2: Convert to fraction form
    14,000.40/21,000.60 = 8,087.40/x
  3. Step 3: Cross multiply
    14,000.40x = 21,000.60 × 8,087.40
  4. Step 4: Simplify right side
    14,000.40x = 169,840,252.44
  5. Step 5: Solve for x
    x = 169,840,252.44/14,000.40
  6. Step 6: Final answer
    x = 12,131.10

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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.