Home / 21,820.25-30,110.09-12,259.38

Finding the Fourth Proportional to 21,820.25, 30,110.09 and 12,259.38

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Solution

The fourth proportional to 21,820.25, 30,110.09 and 12,259.38 is: 16,916.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,820.25 : 30,110.09 = 12,259.38 : x
  2. Step 2: Convert to fraction form
    21,820.25/30,110.09 = 12,259.38/x
  3. Step 3: Cross multiply
    21,820.25x = 30,110.09 × 12,259.38
  4. Step 4: Simplify right side
    21,820.25x = 369,130,973.85
  5. Step 5: Solve for x
    x = 369,130,973.85/21,820.25
  6. Step 6: Final answer
    x = 16,916.90

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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.