Home / 13,684.40-18,886.08-8,379.92

Finding the Fourth Proportional to 13,684.40, 18,886.08 and 8,379.92

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Solution

The fourth proportional to 13,684.40, 18,886.08 and 8,379.92 is: 11,565.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,684.40 : 18,886.08 = 8,379.92 : x
  2. Step 2: Convert to fraction form
    13,684.40/18,886.08 = 8,379.92/x
  3. Step 3: Cross multiply
    13,684.40x = 18,886.08 × 8,379.92
  4. Step 4: Simplify right side
    13,684.40x = 158,263,839.51
  5. Step 5: Solve for x
    x = 158,263,839.51/13,684.40
  6. Step 6: Final answer
    x = 11,565.27

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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.