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Finding the Fourth Proportional to 18,655.32, 27,990.30 and 6,969.48

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Solution

The fourth proportional to 18,655.32, 27,990.30 and 6,969.48 is: 10,456.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,655.32 : 27,990.30 = 6,969.48 : x
  2. Step 2: Convert to fraction form
    18,655.32/27,990.30 = 6,969.48/x
  3. Step 3: Cross multiply
    18,655.32x = 27,990.30 × 6,969.48
  4. Step 4: Simplify right side
    18,655.32x = 195,077,836.04
  5. Step 5: Solve for x
    x = 195,077,836.04/18,655.32
  6. Step 6: Final answer
    x = 10,456.95

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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.