Home / 12,880.80-17,776.59-7,215.44

Finding the Fourth Proportional to 12,880.80, 17,776.59 and 7,215.44

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Solution

The fourth proportional to 12,880.80, 17,776.59 and 7,215.44 is: 9,957.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,880.80 : 17,776.59 = 7,215.44 : x
  2. Step 2: Convert to fraction form
    12,880.80/17,776.59 = 7,215.44/x
  3. Step 3: Cross multiply
    12,880.80x = 17,776.59 × 7,215.44
  4. Step 4: Simplify right side
    12,880.80x = 128,265,918.55
  5. Step 5: Solve for x
    x = 128,265,918.55/12,880.80
  6. Step 6: Final answer
    x = 9,957.92

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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.