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Finding the Fourth Proportional to 18,657.38, 27,985.16 and 6,969.68

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Solution

The fourth proportional to 18,657.38, 27,985.16 and 6,969.68 is: 10,454.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,657.38 : 27,985.16 = 6,969.68 : x
  2. Step 2: Convert to fraction form
    18,657.38/27,985.16 = 6,969.68/x
  3. Step 3: Cross multiply
    18,657.38x = 27,985.16 × 6,969.68
  4. Step 4: Simplify right side
    18,657.38x = 195,047,609.95
  5. Step 5: Solve for x
    x = 195,047,609.95/18,657.38
  6. Step 6: Final answer
    x = 10,454.18

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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.