Home / 21,913.42-30,243.19-12,355.15

Finding the Fourth Proportional to 21,913.42, 30,243.19 and 12,355.15

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Solution

The fourth proportional to 21,913.42, 30,243.19 and 12,355.15 is: 17,051.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,913.42 : 30,243.19 = 12,355.15 : x
  2. Step 2: Convert to fraction form
    21,913.42/30,243.19 = 12,355.15/x
  3. Step 3: Cross multiply
    21,913.42x = 30,243.19 × 12,355.15
  4. Step 4: Simplify right side
    21,913.42x = 373,659,070.18
  5. Step 5: Solve for x
    x = 373,659,070.18/21,913.42
  6. Step 6: Final answer
    x = 17,051.61

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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.