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Finding the Fourth Proportional to 16,929.40, 25,394.10 and 12,555.40

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Solution

The fourth proportional to 16,929.40, 25,394.10 and 12,555.40 is: 18,833.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,929.40 : 25,394.10 = 12,555.40 : x
  2. Step 2: Convert to fraction form
    16,929.40/25,394.10 = 12,555.40/x
  3. Step 3: Cross multiply
    16,929.40x = 25,394.10 × 12,555.40
  4. Step 4: Simplify right side
    16,929.40x = 318,833,083.14
  5. Step 5: Solve for x
    x = 318,833,083.14/16,929.40
  6. Step 6: Final answer
    x = 18,833.10

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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.