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Finding the Fourth Proportional to 6,390.14, 8,813.40 and 4,152.74

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Solution

The fourth proportional to 6,390.14, 8,813.40 and 4,152.74 is: 5,727.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390.14 : 8,813.40 = 4,152.74 : x
  2. Step 2: Convert to fraction form
    6,390.14/8,813.40 = 4,152.74/x
  3. Step 3: Cross multiply
    6,390.14x = 8,813.40 × 4,152.74
  4. Step 4: Simplify right side
    6,390.14x = 36,599,714.65
  5. Step 5: Solve for x
    x = 36,599,714.65/6,390.14
  6. Step 6: Final answer
    x = 5,727.53

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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.