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Finding the Fourth Proportional to 18,609.64, 25,681.28 and 10,651.68

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Solution

The fourth proportional to 18,609.64, 25,681.28 and 10,651.68 is: 14,699.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,609.64 : 25,681.28 = 10,651.68 : x
  2. Step 2: Convert to fraction form
    18,609.64/25,681.28 = 10,651.68/x
  3. Step 3: Cross multiply
    18,609.64x = 25,681.28 × 10,651.68
  4. Step 4: Simplify right side
    18,609.64x = 273,548,776.55
  5. Step 5: Solve for x
    x = 273,548,776.55/18,609.64
  6. Step 6: Final answer
    x = 14,699.31

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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.