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Finding the Fourth Proportional to 10,785.96, 16,178.95 and 3,391.07

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Solution

The fourth proportional to 10,785.96, 16,178.95 and 3,391.07 is: 5,086.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,785.96 : 16,178.95 = 3,391.07 : x
  2. Step 2: Convert to fraction form
    10,785.96/16,178.95 = 3,391.07/x
  3. Step 3: Cross multiply
    10,785.96x = 16,178.95 × 3,391.07
  4. Step 4: Simplify right side
    10,785.96x = 54,863,875.32
  5. Step 5: Solve for x
    x = 54,863,875.32/10,785.96
  6. Step 6: Final answer
    x = 5,086.60

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Half scale
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Double scale
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Similar ratio
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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.