Home / 20,361.15-28,095.12-12,405.87

Finding the Fourth Proportional to 20,361.15, 28,095.12 and 12,405.87

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Solution

The fourth proportional to 20,361.15, 28,095.12 and 12,405.87 is: 17,118.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,361.15 : 28,095.12 = 12,405.87 : x
  2. Step 2: Convert to fraction form
    20,361.15/28,095.12 = 12,405.87/x
  3. Step 3: Cross multiply
    20,361.15x = 28,095.12 × 12,405.87
  4. Step 4: Simplify right side
    20,361.15x = 348,544,406.35
  5. Step 5: Solve for x
    x = 348,544,406.35/20,361.15
  6. Step 6: Final answer
    x = 17,118.11

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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.