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Finding the Fourth Proportional to 4,925.91, 6,789.27 and 3,978.21

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Solution

The fourth proportional to 4,925.91, 6,789.27 and 3,978.21 is: 5,483.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,925.91 : 6,789.27 = 3,978.21 : x
  2. Step 2: Convert to fraction form
    4,925.91/6,789.27 = 3,978.21/x
  3. Step 3: Cross multiply
    4,925.91x = 6,789.27 × 3,978.21
  4. Step 4: Simplify right side
    4,925.91x = 27,009,141.81
  5. Step 5: Solve for x
    x = 27,009,141.81/4,925.91
  6. Step 6: Final answer
    x = 5,483.08

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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.