Home / 20,622.28-28,457.98-11,190.64

Finding the Fourth Proportional to 20,622.28, 28,457.98 and 11,190.64

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Solution

The fourth proportional to 20,622.28, 28,457.98 and 11,190.64 is: 15,442.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.28 : 28,457.98 = 11,190.64 : x
  2. Step 2: Convert to fraction form
    20,622.28/28,457.98 = 11,190.64/x
  3. Step 3: Cross multiply
    20,622.28x = 28,457.98 × 11,190.64
  4. Step 4: Simplify right side
    20,622.28x = 318,463,009.31
  5. Step 5: Solve for x
    x = 318,463,009.31/20,622.28
  6. Step 6: Final answer
    x = 15,442.67

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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.