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Finding the Fourth Proportional to 22,015.80, 30,383.10 and 21,019.50

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Solution

The fourth proportional to 22,015.80, 30,383.10 and 21,019.50 is: 29,008.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,015.80 : 30,383.10 = 21,019.50 : x
  2. Step 2: Convert to fraction form
    22,015.80/30,383.10 = 21,019.50/x
  3. Step 3: Cross multiply
    22,015.80x = 30,383.10 × 21,019.50
  4. Step 4: Simplify right side
    22,015.80x = 638,637,570.45
  5. Step 5: Solve for x
    x = 638,637,570.45/22,015.80
  6. Step 6: Final answer
    x = 29,008.15

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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.