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Finding the Fourth Proportional to 21,041.57, 29,040.18 and 20,349.25

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Solution

The fourth proportional to 21,041.57, 29,040.18 and 20,349.25 is: 28,084.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,041.57 : 29,040.18 = 20,349.25 : x
  2. Step 2: Convert to fraction form
    21,041.57/29,040.18 = 20,349.25/x
  3. Step 3: Cross multiply
    21,041.57x = 29,040.18 × 20,349.25
  4. Step 4: Simplify right side
    21,041.57x = 590,945,635.92
  5. Step 5: Solve for x
    x = 590,945,635.92/21,041.57
  6. Step 6: Final answer
    x = 28,084.68

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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.