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Finding the Fourth Proportional to 9,390.76, 12,959.13 and 5,664.76

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Solution

The fourth proportional to 9,390.76, 12,959.13 and 5,664.76 is: 7,817.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,390.76 : 12,959.13 = 5,664.76 : x
  2. Step 2: Convert to fraction form
    9,390.76/12,959.13 = 5,664.76/x
  3. Step 3: Cross multiply
    9,390.76x = 12,959.13 × 5,664.76
  4. Step 4: Simplify right side
    9,390.76x = 73,410,361.26
  5. Step 5: Solve for x
    x = 73,410,361.26/9,390.76
  6. Step 6: Final answer
    x = 7,817.30

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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.