Home / 10,780.40-16,171.28-3,385.15

Finding the Fourth Proportional to 10,780.40, 16,171.28 and 3,385.15

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Solution

The fourth proportional to 10,780.40, 16,171.28 and 3,385.15 is: 5,077.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,780.40 : 16,171.28 = 3,385.15 : x
  2. Step 2: Convert to fraction form
    10,780.40/16,171.28 = 3,385.15/x
  3. Step 3: Cross multiply
    10,780.40x = 16,171.28 × 3,385.15
  4. Step 4: Simplify right side
    10,780.40x = 54,742,170.25
  5. Step 5: Solve for x
    x = 54,742,170.25/10,780.40
  6. Step 6: Final answer
    x = 5,077.94

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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.