Home / 15,755.58-21,722.49-12,912.66

Finding the Fourth Proportional to 15,755.58, 21,722.49 and 12,912.66

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Solution

The fourth proportional to 15,755.58, 21,722.49 and 12,912.66 is: 17,802.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,755.58 : 21,722.49 = 12,912.66 : x
  2. Step 2: Convert to fraction form
    15,755.58/21,722.49 = 12,912.66/x
  3. Step 3: Cross multiply
    15,755.58x = 21,722.49 × 12,912.66
  4. Step 4: Simplify right side
    15,755.58x = 280,495,127.72
  5. Step 5: Solve for x
    x = 280,495,127.72/15,755.58
  6. Step 6: Final answer
    x = 17,802.91

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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.