Home / 21,515.16-32,157.39-19,401.97

Finding the Fourth Proportional to 21,515.16, 32,157.39 and 19,401.97

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Solution

The fourth proportional to 21,515.16, 32,157.39 and 19,401.97 is: 28,998.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,515.16 : 32,157.39 = 19,401.97 : x
  2. Step 2: Convert to fraction form
    21,515.16/32,157.39 = 19,401.97/x
  3. Step 3: Cross multiply
    21,515.16x = 32,157.39 × 19,401.97
  4. Step 4: Simplify right side
    21,515.16x = 623,916,716.06
  5. Step 5: Solve for x
    x = 623,916,716.06/21,515.16
  6. Step 6: Final answer
    x = 28,998.93

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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.