Home / 21,825.62-30,118.55-13,341.95

Finding the Fourth Proportional to 21,825.62, 30,118.55 and 13,341.95

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Solution

The fourth proportional to 21,825.62, 30,118.55 and 13,341.95 is: 18,411.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,825.62 : 30,118.55 = 13,341.95 : x
  2. Step 2: Convert to fraction form
    21,825.62/30,118.55 = 13,341.95/x
  3. Step 3: Cross multiply
    21,825.62x = 30,118.55 × 13,341.95
  4. Step 4: Simplify right side
    21,825.62x = 401,840,037.58
  5. Step 5: Solve for x
    x = 401,840,037.58/21,825.62
  6. Step 6: Final answer
    x = 18,411.40

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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.