Home / 12,243.60-18,365.40-3,478.40

Finding the Fourth Proportional to 12,243.60, 18,365.40 and 3,478.40

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Solution

The fourth proportional to 12,243.60, 18,365.40 and 3,478.40 is: 5,217.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,243.60 : 18,365.40 = 3,478.40 : x
  2. Step 2: Convert to fraction form
    12,243.60/18,365.40 = 3,478.40/x
  3. Step 3: Cross multiply
    12,243.60x = 18,365.40 × 3,478.40
  4. Step 4: Simplify right side
    12,243.60x = 63,882,207.36
  5. Step 5: Solve for x
    x = 63,882,207.36/12,243.60
  6. Step 6: Final answer
    x = 5,217.60

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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.