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Finding the Fourth Proportional to 13,964.40, 20,946.60 and 12,603.60

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Solution

The fourth proportional to 13,964.40, 20,946.60 and 12,603.60 is: 18,905.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,964.40 : 20,946.60 = 12,603.60 : x
  2. Step 2: Convert to fraction form
    13,964.40/20,946.60 = 12,603.60/x
  3. Step 3: Cross multiply
    13,964.40x = 20,946.60 × 12,603.60
  4. Step 4: Simplify right side
    13,964.40x = 264,002,567.76
  5. Step 5: Solve for x
    x = 264,002,567.76/13,964.40
  6. Step 6: Final answer
    x = 18,905.40

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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.