Home / 21,827.05-30,120.18-12,395

Finding the Fourth Proportional to 21,827.05, 30,120.18 and 12,395

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Solution

The fourth proportional to 21,827.05, 30,120.18 and 12,395 is: 17,104.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,827.05 : 30,120.18 = 12,395 : x
  2. Step 2: Convert to fraction form
    21,827.05/30,120.18 = 12,395/x
  3. Step 3: Cross multiply
    21,827.05x = 30,120.18 × 12,395
  4. Step 4: Simplify right side
    21,827.05x = 373,339,631.10
  5. Step 5: Solve for x
    x = 373,339,631.10/21,827.05
  6. Step 6: Final answer
    x = 17,104.45

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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.