Home / 12,720.72-17,539.32-8,242.83

Finding the Fourth Proportional to 12,720.72, 17,539.32 and 8,242.83

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Solution

The fourth proportional to 12,720.72, 17,539.32 and 8,242.83 is: 11,365.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.72 : 17,539.32 = 8,242.83 : x
  2. Step 2: Convert to fraction form
    12,720.72/17,539.32 = 8,242.83/x
  3. Step 3: Cross multiply
    12,720.72x = 17,539.32 × 8,242.83
  4. Step 4: Simplify right side
    12,720.72x = 144,573,633.08
  5. Step 5: Solve for x
    x = 144,573,633.08/12,720.72
  6. Step 6: Final answer
    x = 11,365.21

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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.