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Finding the Fourth Proportional to 5,129.38, 7,653.80 and 4,815.91

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Solution

The fourth proportional to 5,129.38, 7,653.80 and 4,815.91 is: 7,186.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.38 : 7,653.80 = 4,815.91 : x
  2. Step 2: Convert to fraction form
    5,129.38/7,653.80 = 4,815.91/x
  3. Step 3: Cross multiply
    5,129.38x = 7,653.80 × 4,815.91
  4. Step 4: Simplify right side
    5,129.38x = 36,860,011.96
  5. Step 5: Solve for x
    x = 36,860,011.96/5,129.38
  6. Step 6: Final answer
    x = 7,186.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.