Home / 54,458.90-81,672.15-21,159.80

Finding the Fourth Proportional to 54,458.90, 81,672.15 and 21,159.80

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Solution

The fourth proportional to 54,458.90, 81,672.15 and 21,159.80 is: 31,733.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,458.90 : 81,672.15 = 21,159.80 : x
  2. Step 2: Convert to fraction form
    54,458.90/81,672.15 = 21,159.80/x
  3. Step 3: Cross multiply
    54,458.90x = 81,672.15 × 21,159.80
  4. Step 4: Simplify right side
    54,458.90x = 1,728,166,359.57
  5. Step 5: Solve for x
    x = 1,728,166,359.57/54,458.90
  6. Step 6: Final answer
    x = 31,733.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.