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Finding the Fourth Proportional to 6,420.96, 8,854.92 and 4,058.88

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Solution

The fourth proportional to 6,420.96, 8,854.92 and 4,058.88 is: 5,597.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.96 : 8,854.92 = 4,058.88 : x
  2. Step 2: Convert to fraction form
    6,420.96/8,854.92 = 4,058.88/x
  3. Step 3: Cross multiply
    6,420.96x = 8,854.92 × 4,058.88
  4. Step 4: Simplify right side
    6,420.96x = 35,941,057.69
  5. Step 5: Solve for x
    x = 35,941,057.69/6,420.96
  6. Step 6: Final answer
    x = 5,597.46

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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.