Home / 13,656.12-18,845.34-7,687.86

Finding the Fourth Proportional to 13,656.12, 18,845.34 and 7,687.86

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Solution

The fourth proportional to 13,656.12, 18,845.34 and 7,687.86 is: 10,609.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,656.12 : 18,845.34 = 7,687.86 : x
  2. Step 2: Convert to fraction form
    13,656.12/18,845.34 = 7,687.86/x
  3. Step 3: Cross multiply
    13,656.12x = 18,845.34 × 7,687.86
  4. Step 4: Simplify right side
    13,656.12x = 144,880,335.57
  5. Step 5: Solve for x
    x = 144,880,335.57/13,656.12
  6. Step 6: Final answer
    x = 10,609.19

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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.