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Finding the Fourth Proportional to 10,885.80, 16,328.70 and 8,698.80

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Solution

The fourth proportional to 10,885.80, 16,328.70 and 8,698.80 is: 13,048.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,885.80 : 16,328.70 = 8,698.80 : x
  2. Step 2: Convert to fraction form
    10,885.80/16,328.70 = 8,698.80/x
  3. Step 3: Cross multiply
    10,885.80x = 16,328.70 × 8,698.80
  4. Step 4: Simplify right side
    10,885.80x = 142,040,095.56
  5. Step 5: Solve for x
    x = 142,040,095.56/10,885.80
  6. Step 6: Final answer
    x = 13,048.20

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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.