Home / 21,825.87-30,118.90-13,342.20

Finding the Fourth Proportional to 21,825.87, 30,118.90 and 13,342.20

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Solution

The fourth proportional to 21,825.87, 30,118.90 and 13,342.20 is: 18,411.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,825.87 : 30,118.90 = 13,342.20 : x
  2. Step 2: Convert to fraction form
    21,825.87/30,118.90 = 13,342.20/x
  3. Step 3: Cross multiply
    21,825.87x = 30,118.90 × 13,342.20
  4. Step 4: Simplify right side
    21,825.87x = 401,852,170.27
  5. Step 5: Solve for x
    x = 401,852,170.27/21,825.87
  6. Step 6: Final answer
    x = 18,411.74

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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.