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Finding the Fourth Proportional to 22,910.40, 34,391.20 and 21,406.40

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Solution

The fourth proportional to 22,910.40, 34,391.20 and 21,406.40 is: 32,133.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,910.40 : 34,391.20 = 21,406.40 : x
  2. Step 2: Convert to fraction form
    22,910.40/34,391.20 = 21,406.40/x
  3. Step 3: Cross multiply
    22,910.40x = 34,391.20 × 21,406.40
  4. Step 4: Simplify right side
    22,910.40x = 736,191,783.68
  5. Step 5: Solve for x
    x = 736,191,783.68/22,910.40
  6. Step 6: Final answer
    x = 32,133.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.