Home / 20,427.60-28,191.68-11,475.68

Finding the Fourth Proportional to 20,427.60, 28,191.68 and 11,475.68

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Solution

The fourth proportional to 20,427.60, 28,191.68 and 11,475.68 is: 15,837.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.60 : 28,191.68 = 11,475.68 : x
  2. Step 2: Convert to fraction form
    20,427.60/28,191.68 = 11,475.68/x
  3. Step 3: Cross multiply
    20,427.60x = 28,191.68 × 11,475.68
  4. Step 4: Simplify right side
    20,427.60x = 323,518,698.34
  5. Step 5: Solve for x
    x = 323,518,698.34/20,427.60
  6. Step 6: Final answer
    x = 15,837.33

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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.