Home / 12,918.80-19,366.68-5,122.28

Finding the Fourth Proportional to 12,918.80, 19,366.68 and 5,122.28

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Solution

The fourth proportional to 12,918.80, 19,366.68 and 5,122.28 is: 7,678.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918.80 : 19,366.68 = 5,122.28 : x
  2. Step 2: Convert to fraction form
    12,918.80/19,366.68 = 5,122.28/x
  3. Step 3: Cross multiply
    12,918.80x = 19,366.68 × 5,122.28
  4. Step 4: Simplify right side
    12,918.80x = 99,201,557.63
  5. Step 5: Solve for x
    x = 99,201,557.63/12,918.80
  6. Step 6: Final answer
    x = 7,678.85

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1.5x scale

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.