Home / 13,109.12-18,101.24-10,686.86

Finding the Fourth Proportional to 13,109.12, 18,101.24 and 10,686.86

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Solution

The fourth proportional to 13,109.12, 18,101.24 and 10,686.86 is: 14,756.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,109.12 : 18,101.24 = 10,686.86 : x
  2. Step 2: Convert to fraction form
    13,109.12/18,101.24 = 10,686.86/x
  3. Step 3: Cross multiply
    13,109.12x = 18,101.24 × 10,686.86
  4. Step 4: Simplify right side
    13,109.12x = 193,445,381.72
  5. Step 5: Solve for x
    x = 193,445,381.72/13,109.12
  6. Step 6: Final answer
    x = 14,756.55

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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.