Home / 20,830.96-28,746.76-11,399.52

Finding the Fourth Proportional to 20,830.96, 28,746.76 and 11,399.52

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Solution

The fourth proportional to 20,830.96, 28,746.76 and 11,399.52 is: 15,731.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.96 : 28,746.76 = 11,399.52 : x
  2. Step 2: Convert to fraction form
    20,830.96/28,746.76 = 11,399.52/x
  3. Step 3: Cross multiply
    20,830.96x = 28,746.76 × 11,399.52
  4. Step 4: Simplify right side
    20,830.96x = 327,699,265.56
  5. Step 5: Solve for x
    x = 327,699,265.56/20,830.96
  6. Step 6: Final answer
    x = 15,731.36

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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.