Home / 10,814.40-16,189.20-6,429.60

Finding the Fourth Proportional to 10,814.40, 16,189.20 and 6,429.60

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Solution

The fourth proportional to 10,814.40, 16,189.20 and 6,429.60 is: 9,625.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,814.40 : 16,189.20 = 6,429.60 : x
  2. Step 2: Convert to fraction form
    10,814.40/16,189.20 = 6,429.60/x
  3. Step 3: Cross multiply
    10,814.40x = 16,189.20 × 6,429.60
  4. Step 4: Simplify right side
    10,814.40x = 104,090,080.32
  5. Step 5: Solve for x
    x = 104,090,080.32/10,814.40
  6. Step 6: Final answer
    x = 9,625.14

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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.