Home / 21,984.39-30,339.03-13,491.21

Finding the Fourth Proportional to 21,984.39, 30,339.03 and 13,491.21

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Solution

The fourth proportional to 21,984.39, 30,339.03 and 13,491.21 is: 18,618.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,984.39 : 30,339.03 = 13,491.21 : x
  2. Step 2: Convert to fraction form
    21,984.39/30,339.03 = 13,491.21/x
  3. Step 3: Cross multiply
    21,984.39x = 30,339.03 × 13,491.21
  4. Step 4: Simplify right side
    21,984.39x = 409,310,224.93
  5. Step 5: Solve for x
    x = 409,310,224.93/21,984.39
  6. Step 6: Final answer
    x = 18,618.22

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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.