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Finding the Fourth Proportional to 16,885.80, 25,328.70 and 13,813.80

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Solution

The fourth proportional to 16,885.80, 25,328.70 and 13,813.80 is: 20,720.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,885.80 : 25,328.70 = 13,813.80 : x
  2. Step 2: Convert to fraction form
    16,885.80/25,328.70 = 13,813.80/x
  3. Step 3: Cross multiply
    16,885.80x = 25,328.70 × 13,813.80
  4. Step 4: Simplify right side
    16,885.80x = 349,885,596.06
  5. Step 5: Solve for x
    x = 349,885,596.06/16,885.80
  6. Step 6: Final answer
    x = 20,720.70

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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.