Home / 7,835.40-10,812.72-4,478.04

Finding the Fourth Proportional to 7,835.40, 10,812.72 and 4,478.04

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Solution

The fourth proportional to 7,835.40, 10,812.72 and 4,478.04 is: 6,179.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,835.40 : 10,812.72 = 4,478.04 : x
  2. Step 2: Convert to fraction form
    7,835.40/10,812.72 = 4,478.04/x
  3. Step 3: Cross multiply
    7,835.40x = 10,812.72 × 4,478.04
  4. Step 4: Simplify right side
    7,835.40x = 48,419,792.67
  5. Step 5: Solve for x
    x = 48,419,792.67/7,835.40
  6. Step 6: Final answer
    x = 6,179.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.