Home / 20,689.53-31,015.84-17,208.10

Finding the Fourth Proportional to 20,689.53, 31,015.84 and 17,208.10

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Solution

The fourth proportional to 20,689.53, 31,015.84 and 17,208.10 is: 25,796.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.53 : 31,015.84 = 17,208.10 : x
  2. Step 2: Convert to fraction form
    20,689.53/31,015.84 = 17,208.10/x
  3. Step 3: Cross multiply
    20,689.53x = 31,015.84 × 17,208.10
  4. Step 4: Simplify right side
    20,689.53x = 533,723,555.74
  5. Step 5: Solve for x
    x = 533,723,555.74/20,689.53
  6. Step 6: Final answer
    x = 25,796.79

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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.