Home / 20,813.58-28,722.99-11,860.86

Finding the Fourth Proportional to 20,813.58, 28,722.99 and 11,860.86

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Solution

The fourth proportional to 20,813.58, 28,722.99 and 11,860.86 is: 16,368.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.58 : 28,722.99 = 11,860.86 : x
  2. Step 2: Convert to fraction form
    20,813.58/28,722.99 = 11,860.86/x
  3. Step 3: Cross multiply
    20,813.58x = 28,722.99 × 11,860.86
  4. Step 4: Simplify right side
    20,813.58x = 340,679,363.17
  5. Step 5: Solve for x
    x = 340,679,363.17/20,813.58
  6. Step 6: Final answer
    x = 16,368.13

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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.