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Finding the Fourth Proportional to 18,656.68, 27,972.86 and 8,657.32

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Solution

The fourth proportional to 18,656.68, 27,972.86 and 8,657.32 is: 12,980.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,656.68 : 27,972.86 = 8,657.32 : x
  2. Step 2: Convert to fraction form
    18,656.68/27,972.86 = 8,657.32/x
  3. Step 3: Cross multiply
    18,656.68x = 27,972.86 × 8,657.32
  4. Step 4: Simplify right side
    18,656.68x = 242,170,000.34
  5. Step 5: Solve for x
    x = 242,170,000.34/18,656.68
  6. Step 6: Final answer
    x = 12,980.34

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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.