Home / 11,901.40-16,412.60-7,120.58

Finding the Fourth Proportional to 11,901.40, 16,412.60 and 7,120.58

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Solution

The fourth proportional to 11,901.40, 16,412.60 and 7,120.58 is: 9,819.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,901.40 : 16,412.60 = 7,120.58 : x
  2. Step 2: Convert to fraction form
    11,901.40/16,412.60 = 7,120.58/x
  3. Step 3: Cross multiply
    11,901.40x = 16,412.60 × 7,120.58
  4. Step 4: Simplify right side
    11,901.40x = 116,867,231.31
  5. Step 5: Solve for x
    x = 116,867,231.31/11,901.40
  6. Step 6: Final answer
    x = 9,819.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.