Home / 20,370.27-28,110.72-11,417.76

Finding the Fourth Proportional to 20,370.27, 28,110.72 and 11,417.76

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Solution

The fourth proportional to 20,370.27, 28,110.72 and 11,417.76 is: 15,756.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,370.27 : 28,110.72 = 11,417.76 : x
  2. Step 2: Convert to fraction form
    20,370.27/28,110.72 = 11,417.76/x
  3. Step 3: Cross multiply
    20,370.27x = 28,110.72 × 11,417.76
  4. Step 4: Simplify right side
    20,370.27x = 320,961,454.39
  5. Step 5: Solve for x
    x = 320,961,454.39/20,370.27
  6. Step 6: Final answer
    x = 15,756.37

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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.