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Finding the Fourth Proportional to 5,663.76, 7,815.65 and 3,145.72

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Solution

The fourth proportional to 5,663.76, 7,815.65 and 3,145.72 is: 4,340.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,663.76 : 7,815.65 = 3,145.72 : x
  2. Step 2: Convert to fraction form
    5,663.76/7,815.65 = 3,145.72/x
  3. Step 3: Cross multiply
    5,663.76x = 7,815.65 × 3,145.72
  4. Step 4: Simplify right side
    5,663.76x = 24,585,852.36
  5. Step 5: Solve for x
    x = 24,585,852.36/5,663.76
  6. Step 6: Final answer
    x = 4,340.91

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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.