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Finding the Fourth Proportional to 13,694.40, 18,898.84 and 8,656.80

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Solution

The fourth proportional to 13,694.40, 18,898.84 and 8,656.80 is: 11,946.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,694.40 : 18,898.84 = 8,656.80 : x
  2. Step 2: Convert to fraction form
    13,694.40/18,898.84 = 8,656.80/x
  3. Step 3: Cross multiply
    13,694.40x = 18,898.84 × 8,656.80
  4. Step 4: Simplify right side
    13,694.40x = 163,603,478.11
  5. Step 5: Solve for x
    x = 163,603,478.11/13,694.40
  6. Step 6: Final answer
    x = 11,946.74

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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.