Home / 20,591.08-28,415.64-11,159.80

Finding the Fourth Proportional to 20,591.08, 28,415.64 and 11,159.80

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Solution

The fourth proportional to 20,591.08, 28,415.64 and 11,159.80 is: 15,400.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,591.08 : 28,415.64 = 11,159.80 : x
  2. Step 2: Convert to fraction form
    20,591.08/28,415.64 = 11,159.80/x
  3. Step 3: Cross multiply
    20,591.08x = 28,415.64 × 11,159.80
  4. Step 4: Simplify right side
    20,591.08x = 317,112,859.27
  5. Step 5: Solve for x
    x = 317,112,859.27/20,591.08
  6. Step 6: Final answer
    x = 15,400.50

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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.