Home / 20,718.75-30,918.85-20,600.43

Finding the Fourth Proportional to 20,718.75, 30,918.85 and 20,600.43

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Solution

The fourth proportional to 20,718.75, 30,918.85 and 20,600.43 is: 30,742.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.75 : 30,918.85 = 20,600.43 : x
  2. Step 2: Convert to fraction form
    20,718.75/30,918.85 = 20,600.43/x
  3. Step 3: Cross multiply
    20,718.75x = 30,918.85 × 20,600.43
  4. Step 4: Simplify right side
    20,718.75x = 636,941,605.11
  5. Step 5: Solve for x
    x = 636,941,605.11/20,718.75
  6. Step 6: Final answer
    x = 30,742.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.