Home / 21,829.20-30,138.40-13,774.16

Finding the Fourth Proportional to 21,829.20, 30,138.40 and 13,774.16

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Solution

The fourth proportional to 21,829.20, 30,138.40 and 13,774.16 is: 19,017.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,829.20 : 30,138.40 = 13,774.16 : x
  2. Step 2: Convert to fraction form
    21,829.20/30,138.40 = 13,774.16/x
  3. Step 3: Cross multiply
    21,829.20x = 30,138.40 × 13,774.16
  4. Step 4: Simplify right side
    21,829.20x = 415,131,143.74
  5. Step 5: Solve for x
    x = 415,131,143.74/21,829.20
  6. Step 6: Final answer
    x = 19,017.24

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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.