Home / 7,880.04-11,820.78-3,981.96

Finding the Fourth Proportional to 7,880.04, 11,820.78 and 3,981.96

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Solution

The fourth proportional to 7,880.04, 11,820.78 and 3,981.96 is: 5,973.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,880.04 : 11,820.78 = 3,981.96 : x
  2. Step 2: Convert to fraction form
    7,880.04/11,820.78 = 3,981.96/x
  3. Step 3: Cross multiply
    7,880.04x = 11,820.78 × 3,981.96
  4. Step 4: Simplify right side
    7,880.04x = 47,069,873.13
  5. Step 5: Solve for x
    x = 47,069,873.13/7,880.04
  6. Step 6: Final answer
    x = 5,973.30

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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.