Home / 20,591.34-28,416.06-11,159.90

Finding the Fourth Proportional to 20,591.34, 28,416.06 and 11,159.90

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Solution

The fourth proportional to 20,591.34, 28,416.06 and 11,159.90 is: 15,400.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,591.34 : 28,416.06 = 11,159.90 : x
  2. Step 2: Convert to fraction form
    20,591.34/28,416.06 = 11,159.90/x
  3. Step 3: Cross multiply
    20,591.34x = 28,416.06 × 11,159.90
  4. Step 4: Simplify right side
    20,591.34x = 317,120,387.99
  5. Step 5: Solve for x
    x = 317,120,387.99/20,591.34
  6. Step 6: Final answer
    x = 15,400.67

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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.