Home / 12,890.28-17,788.62-7,301.28

Finding the Fourth Proportional to 12,890.28, 17,788.62 and 7,301.28

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Solution

The fourth proportional to 12,890.28, 17,788.62 and 7,301.28 is: 10,075.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,890.28 : 17,788.62 = 7,301.28 : x
  2. Step 2: Convert to fraction form
    12,890.28/17,788.62 = 7,301.28/x
  3. Step 3: Cross multiply
    12,890.28x = 17,788.62 × 7,301.28
  4. Step 4: Simplify right side
    12,890.28x = 129,879,695.43
  5. Step 5: Solve for x
    x = 129,879,695.43/12,890.28
  6. Step 6: Final answer
    x = 10,075.79

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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.