Home / 12,389.60-18,535.80-11,223.20

Finding the Fourth Proportional to 12,389.60, 18,535.80 and 11,223.20

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Solution

The fourth proportional to 12,389.60, 18,535.80 and 11,223.20 is: 16,790.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,389.60 : 18,535.80 = 11,223.20 : x
  2. Step 2: Convert to fraction form
    12,389.60/18,535.80 = 11,223.20/x
  3. Step 3: Cross multiply
    12,389.60x = 18,535.80 × 11,223.20
  4. Step 4: Simplify right side
    12,389.60x = 208,030,990.56
  5. Step 5: Solve for x
    x = 208,030,990.56/12,389.60
  6. Step 6: Final answer
    x = 16,790.78

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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.