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Finding the Fourth Proportional to 10,940.35, 16,410.41 and 7,421.65

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Solution

The fourth proportional to 10,940.35, 16,410.41 and 7,421.65 is: 11,132.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,940.35 : 16,410.41 = 7,421.65 : x
  2. Step 2: Convert to fraction form
    10,940.35/16,410.41 = 7,421.65/x
  3. Step 3: Cross multiply
    10,940.35x = 16,410.41 × 7,421.65
  4. Step 4: Simplify right side
    10,940.35x = 121,792,319.38
  5. Step 5: Solve for x
    x = 121,792,319.38/10,940.35
  6. Step 6: Final answer
    x = 11,132.40

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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.