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Finding the Fourth Proportional to 12,609.20, 18,913.80 and 10,859.60

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Solution

The fourth proportional to 12,609.20, 18,913.80 and 10,859.60 is: 16,289.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,609.20 : 18,913.80 = 10,859.60 : x
  2. Step 2: Convert to fraction form
    12,609.20/18,913.80 = 10,859.60/x
  3. Step 3: Cross multiply
    12,609.20x = 18,913.80 × 10,859.60
  4. Step 4: Simplify right side
    12,609.20x = 205,396,302.48
  5. Step 5: Solve for x
    x = 205,396,302.48/12,609.20
  6. Step 6: Final answer
    x = 16,289.40

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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.