Home / 13,739.15-18,961.04-7,689.98

Finding the Fourth Proportional to 13,739.15, 18,961.04 and 7,689.98

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Solution

The fourth proportional to 13,739.15, 18,961.04 and 7,689.98 is: 10,612.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,739.15 : 18,961.04 = 7,689.98 : x
  2. Step 2: Convert to fraction form
    13,739.15/18,961.04 = 7,689.98/x
  3. Step 3: Cross multiply
    13,739.15x = 18,961.04 × 7,689.98
  4. Step 4: Simplify right side
    13,739.15x = 145,810,085.01
  5. Step 5: Solve for x
    x = 145,810,085.01/13,739.15
  6. Step 6: Final answer
    x = 10,612.74

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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.