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Finding the Fourth Proportional to 16,860.70, 25,291.05 and 8,112.70

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Solution

The fourth proportional to 16,860.70, 25,291.05 and 8,112.70 is: 12,169.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,860.70 : 25,291.05 = 8,112.70 : x
  2. Step 2: Convert to fraction form
    16,860.70/25,291.05 = 8,112.70/x
  3. Step 3: Cross multiply
    16,860.70x = 25,291.05 × 8,112.70
  4. Step 4: Simplify right side
    16,860.70x = 205,178,701.34
  5. Step 5: Solve for x
    x = 205,178,701.34/16,860.70
  6. Step 6: Final answer
    x = 12,169.05

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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.