Home / 20,720.48-28,585.16-14,003.66

Finding the Fourth Proportional to 20,720.48, 28,585.16 and 14,003.66

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Solution

The fourth proportional to 20,720.48, 28,585.16 and 14,003.66 is: 19,318.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.48 : 28,585.16 = 14,003.66 : x
  2. Step 2: Convert to fraction form
    20,720.48/28,585.16 = 14,003.66/x
  3. Step 3: Cross multiply
    20,720.48x = 28,585.16 × 14,003.66
  4. Step 4: Simplify right side
    20,720.48x = 400,296,861.69
  5. Step 5: Solve for x
    x = 400,296,861.69/20,720.48
  6. Step 6: Final answer
    x = 19,318.90

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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.