Home / 20,422.56-28,188.96-12,356.19

Finding the Fourth Proportional to 20,422.56, 28,188.96 and 12,356.19

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Solution

The fourth proportional to 20,422.56, 28,188.96 and 12,356.19 is: 17,055.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,422.56 : 28,188.96 = 12,356.19 : x
  2. Step 2: Convert to fraction form
    20,422.56/28,188.96 = 12,356.19/x
  3. Step 3: Cross multiply
    20,422.56x = 28,188.96 × 12,356.19
  4. Step 4: Simplify right side
    20,422.56x = 348,308,145.66
  5. Step 5: Solve for x
    x = 348,308,145.66/20,422.56
  6. Step 6: Final answer
    x = 17,055.07

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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.