Home / 21,835.32-30,125.70-12,885.81

Finding the Fourth Proportional to 21,835.32, 30,125.70 and 12,885.81

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Solution

The fourth proportional to 21,835.32, 30,125.70 and 12,885.81 is: 17,778.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,835.32 : 30,125.70 = 12,885.81 : x
  2. Step 2: Convert to fraction form
    21,835.32/30,125.70 = 12,885.81/x
  3. Step 3: Cross multiply
    21,835.32x = 30,125.70 × 12,885.81
  4. Step 4: Simplify right side
    21,835.32x = 388,194,046.32
  5. Step 5: Solve for x
    x = 388,194,046.32/21,835.32
  6. Step 6: Final answer
    x = 17,778.26

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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.