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Finding the Fourth Proportional to 13,698.56, 18,891.50 and 8,654.00

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Solution

The fourth proportional to 13,698.56, 18,891.50 and 8,654.00 is: 11,934.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,698.56 : 18,891.50 = 8,654.00 : x
  2. Step 2: Convert to fraction form
    13,698.56/18,891.50 = 8,654.00/x
  3. Step 3: Cross multiply
    13,698.56x = 18,891.50 × 8,654.00
  4. Step 4: Simplify right side
    13,698.56x = 163,486,903.27
  5. Step 5: Solve for x
    x = 163,486,903.27/13,698.56
  6. Step 6: Final answer
    x = 11,934.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.