Home / 11,078.40-16,585.20-7,384.80

Finding the Fourth Proportional to 11,078.40, 16,585.20 and 7,384.80

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Solution

The fourth proportional to 11,078.40, 16,585.20 and 7,384.80 is: 11,055.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,078.40 : 16,585.20 = 7,384.80 : x
  2. Step 2: Convert to fraction form
    11,078.40/16,585.20 = 7,384.80/x
  3. Step 3: Cross multiply
    11,078.40x = 16,585.20 × 7,384.80
  4. Step 4: Simplify right side
    11,078.40x = 122,478,384.96
  5. Step 5: Solve for x
    x = 122,478,384.96/11,078.40
  6. Step 6: Final answer
    x = 11,055.60

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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.