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Finding the Fourth Proportional to 7,919.76, 10,929 and 4,383.12

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Solution

The fourth proportional to 7,919.76, 10,929 and 4,383.12 is: 6,048.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.76 : 10,929 = 4,383.12 : x
  2. Step 2: Convert to fraction form
    7,919.76/10,929 = 4,383.12/x
  3. Step 3: Cross multiply
    7,919.76x = 10,929 × 4,383.12
  4. Step 4: Simplify right side
    7,919.76x = 47,903,118.48
  5. Step 5: Solve for x
    x = 47,903,118.48/7,919.76
  6. Step 6: Final answer
    x = 6,048.56

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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.