Home / 12,868.77-17,756.36-7,202.42

Finding the Fourth Proportional to 12,868.77, 17,756.36 and 7,202.42

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Solution

The fourth proportional to 12,868.77, 17,756.36 and 7,202.42 is: 9,937.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,868.77 : 17,756.36 = 7,202.42 : x
  2. Step 2: Convert to fraction form
    12,868.77/17,756.36 = 7,202.42/x
  3. Step 3: Cross multiply
    12,868.77x = 17,756.36 × 7,202.42
  4. Step 4: Simplify right side
    12,868.77x = 127,888,637.60
  5. Step 5: Solve for x
    x = 127,888,637.60/12,868.77
  6. Step 6: Final answer
    x = 9,937.91

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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.