Home / 21,750.13-30,019.43-12,805.30

Finding the Fourth Proportional to 21,750.13, 30,019.43 and 12,805.30

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Solution

The fourth proportional to 21,750.13, 30,019.43 and 12,805.30 is: 17,673.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,750.13 : 30,019.43 = 12,805.30 : x
  2. Step 2: Convert to fraction form
    21,750.13/30,019.43 = 12,805.30/x
  3. Step 3: Cross multiply
    21,750.13x = 30,019.43 × 12,805.30
  4. Step 4: Simplify right side
    21,750.13x = 384,407,806.98
  5. Step 5: Solve for x
    x = 384,407,806.98/21,750.13
  6. Step 6: Final answer
    x = 17,673.82

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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.