Home / 20,817.03-31,230.15-9,717.66

Finding the Fourth Proportional to 20,817.03, 31,230.15 and 9,717.66

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Solution

The fourth proportional to 20,817.03, 31,230.15 and 9,717.66 is: 14,578.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.03 : 31,230.15 = 9,717.66 : x
  2. Step 2: Convert to fraction form
    20,817.03/31,230.15 = 9,717.66/x
  3. Step 3: Cross multiply
    20,817.03x = 31,230.15 × 9,717.66
  4. Step 4: Simplify right side
    20,817.03x = 303,483,979.45
  5. Step 5: Solve for x
    x = 303,483,979.45/20,817.03
  6. Step 6: Final answer
    x = 14,578.64

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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.