Home / 21,755.81-30,012.34-14,198.64

Finding the Fourth Proportional to 21,755.81, 30,012.34 and 14,198.64

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Solution

The fourth proportional to 21,755.81, 30,012.34 and 14,198.64 is: 19,587.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,755.81 : 30,012.34 = 14,198.64 : x
  2. Step 2: Convert to fraction form
    21,755.81/30,012.34 = 14,198.64/x
  3. Step 3: Cross multiply
    21,755.81x = 30,012.34 × 14,198.64
  4. Step 4: Simplify right side
    21,755.81x = 426,134,411.22
  5. Step 5: Solve for x
    x = 426,134,411.22/21,755.81
  6. Step 6: Final answer
    x = 19,587.15

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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.