Home / 20,812.85-31,211.06-8,330.55

Finding the Fourth Proportional to 20,812.85, 31,211.06 and 8,330.55

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Solution

The fourth proportional to 20,812.85, 31,211.06 and 8,330.55 is: 12,492.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.85 : 31,211.06 = 8,330.55 : x
  2. Step 2: Convert to fraction form
    20,812.85/31,211.06 = 8,330.55/x
  3. Step 3: Cross multiply
    20,812.85x = 31,211.06 × 8,330.55
  4. Step 4: Simplify right side
    20,812.85x = 260,005,137.19
  5. Step 5: Solve for x
    x = 260,005,137.19/20,812.85
  6. Step 6: Final answer
    x = 12,492.53

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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.