Home / 13,656.28-20,490.36-8,724.64

Finding the Fourth Proportional to 13,656.28, 20,490.36 and 8,724.64

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Solution

The fourth proportional to 13,656.28, 20,490.36 and 8,724.64 is: 13,090.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,656.28 : 20,490.36 = 8,724.64 : x
  2. Step 2: Convert to fraction form
    13,656.28/20,490.36 = 8,724.64/x
  3. Step 3: Cross multiply
    13,656.28x = 20,490.36 × 8,724.64
  4. Step 4: Simplify right side
    13,656.28x = 178,771,014.47
  5. Step 5: Solve for x
    x = 178,771,014.47/13,656.28
  6. Step 6: Final answer
    x = 13,090.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.