Home / 21,275.50-31,941.50-18,175.43

Finding the Fourth Proportional to 21,275.50, 31,941.50 and 18,175.43

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Solution

The fourth proportional to 21,275.50, 31,941.50 and 18,175.43 is: 27,287.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,275.50 : 31,941.50 = 18,175.43 : x
  2. Step 2: Convert to fraction form
    21,275.50/31,941.50 = 18,175.43/x
  3. Step 3: Cross multiply
    21,275.50x = 31,941.50 × 18,175.43
  4. Step 4: Simplify right side
    21,275.50x = 580,550,497.35
  5. Step 5: Solve for x
    x = 580,550,497.35/21,275.50
  6. Step 6: Final answer
    x = 27,287.28

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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.