Home / 11,285.40-16,911.90-8,300.55

Finding the Fourth Proportional to 11,285.40, 16,911.90 and 8,300.55

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Solution

The fourth proportional to 11,285.40, 16,911.90 and 8,300.55 is: 12,438.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,285.40 : 16,911.90 = 8,300.55 : x
  2. Step 2: Convert to fraction form
    11,285.40/16,911.90 = 8,300.55/x
  3. Step 3: Cross multiply
    11,285.40x = 16,911.90 × 8,300.55
  4. Step 4: Simplify right side
    11,285.40x = 140,378,071.55
  5. Step 5: Solve for x
    x = 140,378,071.55/11,285.40
  6. Step 6: Final answer
    x = 12,438.91

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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.