Home / 12,880.45-17,775.24-7,215.15

Finding the Fourth Proportional to 12,880.45, 17,775.24 and 7,215.15

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Solution

The fourth proportional to 12,880.45, 17,775.24 and 7,215.15 is: 9,957.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,880.45 : 17,775.24 = 7,215.15 : x
  2. Step 2: Convert to fraction form
    12,880.45/17,775.24 = 7,215.15/x
  3. Step 3: Cross multiply
    12,880.45x = 17,775.24 × 7,215.15
  4. Step 4: Simplify right side
    12,880.45x = 128,251,022.89
  5. Step 5: Solve for x
    x = 128,251,022.89/12,880.45
  6. Step 6: Final answer
    x = 9,957.03

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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.