Home / 19,422.90-29,109.78-12,400.80

Finding the Fourth Proportional to 19,422.90, 29,109.78 and 12,400.80

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Solution

The fourth proportional to 19,422.90, 29,109.78 and 12,400.80 is: 18,585.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,422.90 : 29,109.78 = 12,400.80 : x
  2. Step 2: Convert to fraction form
    19,422.90/29,109.78 = 12,400.80/x
  3. Step 3: Cross multiply
    19,422.90x = 29,109.78 × 12,400.80
  4. Step 4: Simplify right side
    19,422.90x = 360,984,559.82
  5. Step 5: Solve for x
    x = 360,984,559.82/19,422.90
  6. Step 6: Final answer
    x = 18,585.51

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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.