Home / 7,880.32-11,820.48-1,957.20

Finding the Fourth Proportional to 7,880.32, 11,820.48 and 1,957.20

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Solution

The fourth proportional to 7,880.32, 11,820.48 and 1,957.20 is: 2,935.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,880.32 : 11,820.48 = 1,957.20 : x
  2. Step 2: Convert to fraction form
    7,880.32/11,820.48 = 1,957.20/x
  3. Step 3: Cross multiply
    7,880.32x = 11,820.48 × 1,957.20
  4. Step 4: Simplify right side
    7,880.32x = 23,135,043.46
  5. Step 5: Solve for x
    x = 23,135,043.46/7,880.32
  6. Step 6: Final answer
    x = 2,935.80

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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.