Home / 13,655.10-18,842.16-7,989.55

Finding the Fourth Proportional to 13,655.10, 18,842.16 and 7,989.55

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Solution

The fourth proportional to 13,655.10, 18,842.16 and 7,989.55 is: 11,024.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,655.10 : 18,842.16 = 7,989.55 : x
  2. Step 2: Convert to fraction form
    13,655.10/18,842.16 = 7,989.55/x
  3. Step 3: Cross multiply
    13,655.10x = 18,842.16 × 7,989.55
  4. Step 4: Simplify right side
    13,655.10x = 150,540,379.43
  5. Step 5: Solve for x
    x = 150,540,379.43/13,655.10
  6. Step 6: Final answer
    x = 11,024.48

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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.