Home / 21,899.67-30,215.28-12,336.21

Finding the Fourth Proportional to 21,899.67, 30,215.28 and 12,336.21

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Solution

The fourth proportional to 21,899.67, 30,215.28 and 12,336.21 is: 17,020.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,899.67 : 30,215.28 = 12,336.21 : x
  2. Step 2: Convert to fraction form
    21,899.67/30,215.28 = 12,336.21/x
  3. Step 3: Cross multiply
    21,899.67x = 30,215.28 × 12,336.21
  4. Step 4: Simplify right side
    21,899.67x = 372,742,039.29
  5. Step 5: Solve for x
    x = 372,742,039.29/21,899.67
  6. Step 6: Final answer
    x = 17,020.44

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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.