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Finding the Fourth Proportional to 19,815.40, 29,679.90 and 16,359.40

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Solution

The fourth proportional to 19,815.40, 29,679.90 and 16,359.40 is: 24,503.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,815.40 : 29,679.90 = 16,359.40 : x
  2. Step 2: Convert to fraction form
    19,815.40/29,679.90 = 16,359.40/x
  3. Step 3: Cross multiply
    19,815.40x = 29,679.90 × 16,359.40
  4. Step 4: Simplify right side
    19,815.40x = 485,545,356.06
  5. Step 5: Solve for x
    x = 485,545,356.06/19,815.40
  6. Step 6: Final answer
    x = 24,503.43

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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.