Home / 12,378.40-18,535.20-9,073.60

Finding the Fourth Proportional to 12,378.40, 18,535.20 and 9,073.60

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Solution

The fourth proportional to 12,378.40, 18,535.20 and 9,073.60 is: 13,586.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,378.40 : 18,535.20 = 9,073.60 : x
  2. Step 2: Convert to fraction form
    12,378.40/18,535.20 = 9,073.60/x
  3. Step 3: Cross multiply
    12,378.40x = 18,535.20 × 9,073.60
  4. Step 4: Simplify right side
    12,378.40x = 168,180,990.72
  5. Step 5: Solve for x
    x = 168,180,990.72/12,378.40
  6. Step 6: Final answer
    x = 13,586.65

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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.