Home / 20,559.64-28,372.86-12,490.55

Finding the Fourth Proportional to 20,559.64, 28,372.86 and 12,490.55

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Solution

The fourth proportional to 20,559.64, 28,372.86 and 12,490.55 is: 17,237.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,559.64 : 28,372.86 = 12,490.55 : x
  2. Step 2: Convert to fraction form
    20,559.64/28,372.86 = 12,490.55/x
  3. Step 3: Cross multiply
    20,559.64x = 28,372.86 × 12,490.55
  4. Step 4: Simplify right side
    20,559.64x = 354,392,524.31
  5. Step 5: Solve for x
    x = 354,392,524.31/20,559.64
  6. Step 6: Final answer
    x = 17,237.29

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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.