Home / 20,621.39-28,457.60-11,189.96

Finding the Fourth Proportional to 20,621.39, 28,457.60 and 11,189.96

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Solution

The fourth proportional to 20,621.39, 28,457.60 and 11,189.96 is: 15,442.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.39 : 28,457.60 = 11,189.96 : x
  2. Step 2: Convert to fraction form
    20,621.39/28,457.60 = 11,189.96/x
  3. Step 3: Cross multiply
    20,621.39x = 28,457.60 × 11,189.96
  4. Step 4: Simplify right side
    20,621.39x = 318,439,207.46
  5. Step 5: Solve for x
    x = 318,439,207.46/20,621.39
  6. Step 6: Final answer
    x = 15,442.18

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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.