Home / 7,011.20-9,676.80-5,129.60

Finding the Fourth Proportional to 7,011.20, 9,676.80 and 5,129.60

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Solution

The fourth proportional to 7,011.20, 9,676.80 and 5,129.60 is: 7,079.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,011.20 : 9,676.80 = 5,129.60 : x
  2. Step 2: Convert to fraction form
    7,011.20/9,676.80 = 5,129.60/x
  3. Step 3: Cross multiply
    7,011.20x = 9,676.80 × 5,129.60
  4. Step 4: Simplify right side
    7,011.20x = 49,638,113.28
  5. Step 5: Solve for x
    x = 49,638,113.28/7,011.20
  6. Step 6: Final answer
    x = 7,079.83

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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.