Home / 8,415.16-11,615.34-5,628.76

Finding the Fourth Proportional to 8,415.16, 11,615.34 and 5,628.76

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Solution

The fourth proportional to 8,415.16, 11,615.34 and 5,628.76 is: 7,769.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,415.16 : 11,615.34 = 5,628.76 : x
  2. Step 2: Convert to fraction form
    8,415.16/11,615.34 = 5,628.76/x
  3. Step 3: Cross multiply
    8,415.16x = 11,615.34 × 5,628.76
  4. Step 4: Simplify right side
    8,415.16x = 65,379,961.18
  5. Step 5: Solve for x
    x = 65,379,961.18/8,415.16
  6. Step 6: Final answer
    x = 7,769.31

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Half scale
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Double scale
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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.