Home / 20,591.14-28,415.80-11,159.70

Finding the Fourth Proportional to 20,591.14, 28,415.80 and 11,159.70

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Solution

The fourth proportional to 20,591.14, 28,415.80 and 11,159.70 is: 15,400.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,591.14 : 28,415.80 = 11,159.70 : x
  2. Step 2: Convert to fraction form
    20,591.14/28,415.80 = 11,159.70/x
  3. Step 3: Cross multiply
    20,591.14x = 28,415.80 × 11,159.70
  4. Step 4: Simplify right side
    20,591.14x = 317,111,803.26
  5. Step 5: Solve for x
    x = 317,111,803.26/20,591.14
  6. Step 6: Final answer
    x = 15,400.40

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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.