Home / 20,415.60-28,171.26-11,461.86

Finding the Fourth Proportional to 20,415.60, 28,171.26 and 11,461.86

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Solution

The fourth proportional to 20,415.60, 28,171.26 and 11,461.86 is: 15,816.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.60 : 28,171.26 = 11,461.86 : x
  2. Step 2: Convert to fraction form
    20,415.60/28,171.26 = 11,461.86/x
  3. Step 3: Cross multiply
    20,415.60x = 28,171.26 × 11,461.86
  4. Step 4: Simplify right side
    20,415.60x = 322,895,038.14
  5. Step 5: Solve for x
    x = 322,895,038.14/20,415.60
  6. Step 6: Final answer
    x = 15,816.09

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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.