Home / 21,378.38-29,503.09-12,180.22

Finding the Fourth Proportional to 21,378.38, 29,503.09 and 12,180.22

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Solution

The fourth proportional to 21,378.38, 29,503.09 and 12,180.22 is: 16,809.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.38 : 29,503.09 = 12,180.22 : x
  2. Step 2: Convert to fraction form
    21,378.38/29,503.09 = 12,180.22/x
  3. Step 3: Cross multiply
    21,378.38x = 29,503.09 × 12,180.22
  4. Step 4: Simplify right side
    21,378.38x = 359,354,165.79
  5. Step 5: Solve for x
    x = 359,354,165.79/21,378.38
  6. Step 6: Final answer
    x = 16,809.23

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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.