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Finding the Fourth Proportional to 9,920.64, 14,881.68 and 2,995.68

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Solution

The fourth proportional to 9,920.64, 14,881.68 and 2,995.68 is: 4,493.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,920.64 : 14,881.68 = 2,995.68 : x
  2. Step 2: Convert to fraction form
    9,920.64/14,881.68 = 2,995.68/x
  3. Step 3: Cross multiply
    9,920.64x = 14,881.68 × 2,995.68
  4. Step 4: Simplify right side
    9,920.64x = 44,580,751.14
  5. Step 5: Solve for x
    x = 44,580,751.14/9,920.64
  6. Step 6: Final answer
    x = 4,493.74

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.