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Finding the Fourth Proportional to 19,614.60, 29,421.90 and 18,318.60

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Solution

The fourth proportional to 19,614.60, 29,421.90 and 18,318.60 is: 27,477.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,614.60 : 29,421.90 = 18,318.60 : x
  2. Step 2: Convert to fraction form
    19,614.60/29,421.90 = 18,318.60/x
  3. Step 3: Cross multiply
    19,614.60x = 29,421.90 × 18,318.60
  4. Step 4: Simplify right side
    19,614.60x = 538,968,017.34
  5. Step 5: Solve for x
    x = 538,968,017.34/19,614.60
  6. Step 6: Final answer
    x = 27,477.90

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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.