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Finding the Fourth Proportional to 13,402, 18,494.78 and 7,814.08

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Solution

The fourth proportional to 13,402, 18,494.78 and 7,814.08 is: 10,783.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,402 : 18,494.78 = 7,814.08 : x
  2. Step 2: Convert to fraction form
    13,402/18,494.78 = 7,814.08/x
  3. Step 3: Cross multiply
    13,402x = 18,494.78 × 7,814.08
  4. Step 4: Simplify right side
    13,402x = 144,519,651.43
  5. Step 5: Solve for x
    x = 144,519,651.43/13,402
  6. Step 6: Final answer
    x = 10,783.44

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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.