Home / 20,591.21-28,417.64-11,640.31

Finding the Fourth Proportional to 20,591.21, 28,417.64 and 11,640.31

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Solution

The fourth proportional to 20,591.21, 28,417.64 and 11,640.31 is: 16,064.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,591.21 : 28,417.64 = 11,640.31 : x
  2. Step 2: Convert to fraction form
    20,591.21/28,417.64 = 11,640.31/x
  3. Step 3: Cross multiply
    20,591.21x = 28,417.64 × 11,640.31
  4. Step 4: Simplify right side
    20,591.21x = 330,790,009.82
  5. Step 5: Solve for x
    x = 330,790,009.82/20,591.21
  6. Step 6: Final answer
    x = 16,064.62

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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.