Home / 13,709.86-20,565.80-12,077.70

Finding the Fourth Proportional to 13,709.86, 20,565.80 and 12,077.70

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Solution

The fourth proportional to 13,709.86, 20,565.80 and 12,077.70 is: 18,117.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,709.86 : 20,565.80 = 12,077.70 : x
  2. Step 2: Convert to fraction form
    13,709.86/20,565.80 = 12,077.70/x
  3. Step 3: Cross multiply
    13,709.86x = 20,565.80 × 12,077.70
  4. Step 4: Simplify right side
    13,709.86x = 248,387,562.66
  5. Step 5: Solve for x
    x = 248,387,562.66/13,709.86
  6. Step 6: Final answer
    x = 18,117.44

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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.