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Finding the Fourth Proportional to 7,339.47, 10,128.47 and 4,195.73

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Solution

The fourth proportional to 7,339.47, 10,128.47 and 4,195.73 is: 5,790.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,339.47 : 10,128.47 = 4,195.73 : x
  2. Step 2: Convert to fraction form
    7,339.47/10,128.47 = 4,195.73/x
  3. Step 3: Cross multiply
    7,339.47x = 10,128.47 × 4,195.73
  4. Step 4: Simplify right side
    7,339.47x = 42,496,274.79
  5. Step 5: Solve for x
    x = 42,496,274.79/7,339.47
  6. Step 6: Final answer
    x = 5,790.10

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Half scale
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Double scale
Find fourth proportional to 7,340.47, 10,129.85 and 4,196.73
Similar ratio
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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.