Home / 20,720.34-28,594.08-11,288.88

Finding the Fourth Proportional to 20,720.34, 28,594.08 and 11,288.88

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Solution

The fourth proportional to 20,720.34, 28,594.08 and 11,288.88 is: 15,578.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.34 : 28,594.08 = 11,288.88 : x
  2. Step 2: Convert to fraction form
    20,720.34/28,594.08 = 11,288.88/x
  3. Step 3: Cross multiply
    20,720.34x = 28,594.08 × 11,288.88
  4. Step 4: Simplify right side
    20,720.34x = 322,795,137.83
  5. Step 5: Solve for x
    x = 322,795,137.83/20,720.34
  6. Step 6: Final answer
    x = 15,578.66

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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.