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Finding the Fourth Proportional to 13,644.70, 18,807.74 and 10,189.70

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Solution

The fourth proportional to 13,644.70, 18,807.74 and 10,189.70 is: 14,045.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,644.70 : 18,807.74 = 10,189.70 : x
  2. Step 2: Convert to fraction form
    13,644.70/18,807.74 = 10,189.70/x
  3. Step 3: Cross multiply
    13,644.70x = 18,807.74 × 10,189.70
  4. Step 4: Simplify right side
    13,644.70x = 191,645,228.28
  5. Step 5: Solve for x
    x = 191,645,228.28/13,644.70
  6. Step 6: Final answer
    x = 14,045.40

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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.