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Finding the Fourth Proportional to 13,610.70, 18,816.45 and 13,486.01

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Solution

The fourth proportional to 13,610.70, 18,816.45 and 13,486.01 is: 18,644.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,610.70 : 18,816.45 = 13,486.01 : x
  2. Step 2: Convert to fraction form
    13,610.70/18,816.45 = 13,486.01/x
  3. Step 3: Cross multiply
    13,610.70x = 18,816.45 × 13,486.01
  4. Step 4: Simplify right side
    13,610.70x = 253,758,869.91
  5. Step 5: Solve for x
    x = 253,758,869.91/13,610.70
  6. Step 6: Final answer
    x = 18,644.07

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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.