Home / 21,309.76-29,410.24-15,361.12

Finding the Fourth Proportional to 21,309.76, 29,410.24 and 15,361.12

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Solution

The fourth proportional to 21,309.76, 29,410.24 and 15,361.12 is: 21,200.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.76 : 29,410.24 = 15,361.12 : x
  2. Step 2: Convert to fraction form
    21,309.76/29,410.24 = 15,361.12/x
  3. Step 3: Cross multiply
    21,309.76x = 29,410.24 × 15,361.12
  4. Step 4: Simplify right side
    21,309.76x = 451,774,225.87
  5. Step 5: Solve for x
    x = 451,774,225.87/21,309.76
  6. Step 6: Final answer
    x = 21,200.34

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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.