Home / 10,939.76-16,406.40-5,742.80

Finding the Fourth Proportional to 10,939.76, 16,406.40 and 5,742.80

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Solution

The fourth proportional to 10,939.76, 16,406.40 and 5,742.80 is: 8,612.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,939.76 : 16,406.40 = 5,742.80 : x
  2. Step 2: Convert to fraction form
    10,939.76/16,406.40 = 5,742.80/x
  3. Step 3: Cross multiply
    10,939.76x = 16,406.40 × 5,742.80
  4. Step 4: Simplify right side
    10,939.76x = 94,218,673.92
  5. Step 5: Solve for x
    x = 94,218,673.92/10,939.76
  6. Step 6: Final answer
    x = 8,612.50

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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.