Home / 20,140.64-30,208.50-10,287.02

Finding the Fourth Proportional to 20,140.64, 30,208.50 and 10,287.02

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Solution

The fourth proportional to 20,140.64, 30,208.50 and 10,287.02 is: 15,429.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.64 : 30,208.50 = 10,287.02 : x
  2. Step 2: Convert to fraction form
    20,140.64/30,208.50 = 10,287.02/x
  3. Step 3: Cross multiply
    20,140.64x = 30,208.50 × 10,287.02
  4. Step 4: Simplify right side
    20,140.64x = 310,755,443.67
  5. Step 5: Solve for x
    x = 310,755,443.67/20,140.64
  6. Step 6: Final answer
    x = 15,429.27

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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.