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Finding the Fourth Proportional to 18,452.81, 27,681.95 and 16,688.63

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Solution

The fourth proportional to 18,452.81, 27,681.95 and 16,688.63 is: 25,035.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,452.81 : 27,681.95 = 16,688.63 : x
  2. Step 2: Convert to fraction form
    18,452.81/27,681.95 = 16,688.63/x
  3. Step 3: Cross multiply
    18,452.81x = 27,681.95 × 16,688.63
  4. Step 4: Simplify right side
    18,452.81x = 461,973,932.15
  5. Step 5: Solve for x
    x = 461,973,932.15/18,452.81
  6. Step 6: Final answer
    x = 25,035.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.