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Finding the Fourth Proportional to 28,294.20, 42,401.04 and 20,840.04

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Solution

The fourth proportional to 28,294.20, 42,401.04 and 20,840.04 is: 31,230.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,294.20 : 42,401.04 = 20,840.04 : x
  2. Step 2: Convert to fraction form
    28,294.20/42,401.04 = 20,840.04/x
  3. Step 3: Cross multiply
    28,294.20x = 42,401.04 × 20,840.04
  4. Step 4: Simplify right side
    28,294.20x = 883,639,369.64
  5. Step 5: Solve for x
    x = 883,639,369.64/28,294.20
  6. Step 6: Final answer
    x = 31,230.41

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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.