Home / 28,422.90-42,643.26-11,790.78

Finding the Fourth Proportional to 28,422.90, 42,643.26 and 11,790.78

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Solution

The fourth proportional to 28,422.90, 42,643.26 and 11,790.78 is: 17,689.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,422.90 : 42,643.26 = 11,790.78 : x
  2. Step 2: Convert to fraction form
    28,422.90/42,643.26 = 11,790.78/x
  3. Step 3: Cross multiply
    28,422.90x = 42,643.26 × 11,790.78
  4. Step 4: Simplify right side
    28,422.90x = 502,797,297.14
  5. Step 5: Solve for x
    x = 502,797,297.14/28,422.90
  6. Step 6: Final answer
    x = 17,689.87

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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.