Home / 13,421.60-20,110.80-11,218.40

Finding the Fourth Proportional to 13,421.60, 20,110.80 and 11,218.40

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Solution

The fourth proportional to 13,421.60, 20,110.80 and 11,218.40 is: 16,809.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.60 : 20,110.80 = 11,218.40 : x
  2. Step 2: Convert to fraction form
    13,421.60/20,110.80 = 11,218.40/x
  3. Step 3: Cross multiply
    13,421.60x = 20,110.80 × 11,218.40
  4. Step 4: Simplify right side
    13,421.60x = 225,610,998.72
  5. Step 5: Solve for x
    x = 225,610,998.72/13,421.60
  6. Step 6: Final answer
    x = 16,809.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.