Home / 20,720.67-28,594.31-11,768.55

Finding the Fourth Proportional to 20,720.67, 28,594.31 and 11,768.55

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Solution

The fourth proportional to 20,720.67, 28,594.31 and 11,768.55 is: 16,240.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.67 : 28,594.31 = 11,768.55 : x
  2. Step 2: Convert to fraction form
    20,720.67/28,594.31 = 11,768.55/x
  3. Step 3: Cross multiply
    20,720.67x = 28,594.31 × 11,768.55
  4. Step 4: Simplify right side
    20,720.67x = 336,513,508.11
  5. Step 5: Solve for x
    x = 336,513,508.11/20,720.67
  6. Step 6: Final answer
    x = 16,240.47

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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.