Home / 20,429.80-30,644.70-11,665.60

Finding the Fourth Proportional to 20,429.80, 30,644.70 and 11,665.60

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Solution

The fourth proportional to 20,429.80, 30,644.70 and 11,665.60 is: 17,498.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.80 : 30,644.70 = 11,665.60 : x
  2. Step 2: Convert to fraction form
    20,429.80/30,644.70 = 11,665.60/x
  3. Step 3: Cross multiply
    20,429.80x = 30,644.70 × 11,665.60
  4. Step 4: Simplify right side
    20,429.80x = 357,488,812.32
  5. Step 5: Solve for x
    x = 357,488,812.32/20,429.80
  6. Step 6: Final answer
    x = 17,498.40

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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.