Home / 20,282.50-30,423.75-6,431.50

Finding the Fourth Proportional to 20,282.50, 30,423.75 and 6,431.50

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Solution

The fourth proportional to 20,282.50, 30,423.75 and 6,431.50 is: 9,647.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,282.50 : 30,423.75 = 6,431.50 : x
  2. Step 2: Convert to fraction form
    20,282.50/30,423.75 = 6,431.50/x
  3. Step 3: Cross multiply
    20,282.50x = 30,423.75 × 6,431.50
  4. Step 4: Simplify right side
    20,282.50x = 195,670,348.13
  5. Step 5: Solve for x
    x = 195,670,348.13/20,282.50
  6. Step 6: Final answer
    x = 9,647.25

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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.