Home / 8,276.76-11,420.28-5,290.32

Finding the Fourth Proportional to 8,276.76, 11,420.28 and 5,290.32

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Solution

The fourth proportional to 8,276.76, 11,420.28 and 5,290.32 is: 7,299.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,276.76 : 11,420.28 = 5,290.32 : x
  2. Step 2: Convert to fraction form
    8,276.76/11,420.28 = 5,290.32/x
  3. Step 3: Cross multiply
    8,276.76x = 11,420.28 × 5,290.32
  4. Step 4: Simplify right side
    8,276.76x = 60,416,935.69
  5. Step 5: Solve for x
    x = 60,416,935.69/8,276.76
  6. Step 6: Final answer
    x = 7,299.59

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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.