Home / 56,420.72-84,638.34-18,964.64

Finding the Fourth Proportional to 56,420.72, 84,638.34 and 18,964.64

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Solution

The fourth proportional to 56,420.72, 84,638.34 and 18,964.64 is: 28,449.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,420.72 : 84,638.34 = 18,964.64 : x
  2. Step 2: Convert to fraction form
    56,420.72/84,638.34 = 18,964.64/x
  3. Step 3: Cross multiply
    56,420.72x = 84,638.34 × 18,964.64
  4. Step 4: Simplify right side
    56,420.72x = 1,605,135,648.30
  5. Step 5: Solve for x
    x = 1,605,135,648.30/56,420.72
  6. Step 6: Final answer
    x = 28,449.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.