Home / 20,955.86-28,917.63-12,457.54

Finding the Fourth Proportional to 20,955.86, 28,917.63 and 12,457.54

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Solution

The fourth proportional to 20,955.86, 28,917.63 and 12,457.54 is: 17,190.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,955.86 : 28,917.63 = 12,457.54 : x
  2. Step 2: Convert to fraction form
    20,955.86/28,917.63 = 12,457.54/x
  3. Step 3: Cross multiply
    20,955.86x = 28,917.63 × 12,457.54
  4. Step 4: Simplify right side
    20,955.86x = 360,242,460.14
  5. Step 5: Solve for x
    x = 360,242,460.14/20,955.86
  6. Step 6: Final answer
    x = 17,190.54

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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.