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Finding the Fourth Proportional to 13,692.70, 18,898.86 and 8,653.72

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Solution

The fourth proportional to 13,692.70, 18,898.86 and 8,653.72 is: 11,943.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,692.70 : 18,898.86 = 8,653.72 : x
  2. Step 2: Convert to fraction form
    13,692.70/18,898.86 = 8,653.72/x
  3. Step 3: Cross multiply
    13,692.70x = 18,898.86 × 8,653.72
  4. Step 4: Simplify right side
    13,692.70x = 163,545,442.76
  5. Step 5: Solve for x
    x = 163,545,442.76/13,692.70
  6. Step 6: Final answer
    x = 11,943.99

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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.