Home / 10,985.80-16,469.10-9,819.40

Finding the Fourth Proportional to 10,985.80, 16,469.10 and 9,819.40

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Solution

The fourth proportional to 10,985.80, 16,469.10 and 9,819.40 is: 14,720.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,985.80 : 16,469.10 = 9,819.40 : x
  2. Step 2: Convert to fraction form
    10,985.80/16,469.10 = 9,819.40/x
  3. Step 3: Cross multiply
    10,985.80x = 16,469.10 × 9,819.40
  4. Step 4: Simplify right side
    10,985.80x = 161,716,680.54
  5. Step 5: Solve for x
    x = 161,716,680.54/10,985.80
  6. Step 6: Final answer
    x = 14,720.52

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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.