Home / 20,840.56-28,759.92-12,457.12

Finding the Fourth Proportional to 20,840.56, 28,759.92 and 12,457.12

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Solution

The fourth proportional to 20,840.56, 28,759.92 and 12,457.12 is: 17,190.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.56 : 28,759.92 = 12,457.12 : x
  2. Step 2: Convert to fraction form
    20,840.56/28,759.92 = 12,457.12/x
  3. Step 3: Cross multiply
    20,840.56x = 28,759.92 × 12,457.12
  4. Step 4: Simplify right side
    20,840.56x = 358,265,774.63
  5. Step 5: Solve for x
    x = 358,265,774.63/20,840.56
  6. Step 6: Final answer
    x = 17,190.79

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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.