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Finding the Fourth Proportional to 56,076.87, 84,090.69 and 20,991.92

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Solution

The fourth proportional to 56,076.87, 84,090.69 and 20,991.92 is: 31,478.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,076.87 : 84,090.69 = 20,991.92 : x
  2. Step 2: Convert to fraction form
    56,076.87/84,090.69 = 20,991.92/x
  3. Step 3: Cross multiply
    56,076.87x = 84,090.69 × 20,991.92
  4. Step 4: Simplify right side
    56,076.87x = 1,765,225,037.22
  5. Step 5: Solve for x
    x = 1,765,225,037.22/56,076.87
  6. Step 6: Final answer
    x = 31,478.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.