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Finding the Fourth Proportional to 18,655.68, 27,971.36 and 8,656.32

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Solution

The fourth proportional to 18,655.68, 27,971.36 and 8,656.32 is: 12,978.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,655.68 : 27,971.36 = 8,656.32 : x
  2. Step 2: Convert to fraction form
    18,655.68/27,971.36 = 8,656.32/x
  3. Step 3: Cross multiply
    18,655.68x = 27,971.36 × 8,656.32
  4. Step 4: Simplify right side
    18,655.68x = 242,129,043.00
  5. Step 5: Solve for x
    x = 242,129,043.00/18,655.68
  6. Step 6: Final answer
    x = 12,978.84

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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.