Home / 13,440.48-18,539.64-8,658.78

Finding the Fourth Proportional to 13,440.48, 18,539.64 and 8,658.78

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Solution

The fourth proportional to 13,440.48, 18,539.64 and 8,658.78 is: 11,943.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,440.48 : 18,539.64 = 8,658.78 : x
  2. Step 2: Convert to fraction form
    13,440.48/18,539.64 = 8,658.78/x
  3. Step 3: Cross multiply
    13,440.48x = 18,539.64 × 8,658.78
  4. Step 4: Simplify right side
    13,440.48x = 160,530,664.04
  5. Step 5: Solve for x
    x = 160,530,664.04/13,440.48
  6. Step 6: Final answer
    x = 11,943.82

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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.