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Finding the Fourth Proportional to 18,656.80, 27,985.68 and 6,176.80

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Solution

The fourth proportional to 18,656.80, 27,985.68 and 6,176.80 is: 9,265.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,656.80 : 27,985.68 = 6,176.80 : x
  2. Step 2: Convert to fraction form
    18,656.80/27,985.68 = 6,176.80/x
  3. Step 3: Cross multiply
    18,656.80x = 27,985.68 × 6,176.80
  4. Step 4: Simplify right side
    18,656.80x = 172,861,948.22
  5. Step 5: Solve for x
    x = 172,861,948.22/18,656.80
  6. Step 6: Final answer
    x = 9,265.36

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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.