Home / 13,539.98-18,684.39-7,489.86

Finding the Fourth Proportional to 13,539.98, 18,684.39 and 7,489.86

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Solution

The fourth proportional to 13,539.98, 18,684.39 and 7,489.86 is: 10,335.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,539.98 : 18,684.39 = 7,489.86 : x
  2. Step 2: Convert to fraction form
    13,539.98/18,684.39 = 7,489.86/x
  3. Step 3: Cross multiply
    13,539.98x = 18,684.39 × 7,489.86
  4. Step 4: Simplify right side
    13,539.98x = 139,943,465.29
  5. Step 5: Solve for x
    x = 139,943,465.29/13,539.98
  6. Step 6: Final answer
    x = 10,335.58

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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.