Home / 20,354.00-28,087.16-11,399.45

Finding the Fourth Proportional to 20,354.00, 28,087.16 and 11,399.45

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Solution

The fourth proportional to 20,354.00, 28,087.16 and 11,399.45 is: 15,730.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,354.00 : 28,087.16 = 11,399.45 : x
  2. Step 2: Convert to fraction form
    20,354.00/28,087.16 = 11,399.45/x
  3. Step 3: Cross multiply
    20,354.00x = 28,087.16 × 11,399.45
  4. Step 4: Simplify right side
    20,354.00x = 320,177,978.63
  5. Step 5: Solve for x
    x = 320,177,978.63/20,354.00
  6. Step 6: Final answer
    x = 15,730.47

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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.