Home / 21,761.44-30,028.51-12,808.40

Finding the Fourth Proportional to 21,761.44, 30,028.51 and 12,808.40

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Solution

The fourth proportional to 21,761.44, 30,028.51 and 12,808.40 is: 17,674.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,761.44 : 30,028.51 = 12,808.40 : x
  2. Step 2: Convert to fraction form
    21,761.44/30,028.51 = 12,808.40/x
  3. Step 3: Cross multiply
    21,761.44x = 30,028.51 × 12,808.40
  4. Step 4: Simplify right side
    21,761.44x = 384,617,210.53
  5. Step 5: Solve for x
    x = 384,617,210.53/21,761.44
  6. Step 6: Final answer
    x = 17,674.26

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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.