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Finding the Fourth Proportional to 15,391.20, 23,038.20 and 14,905.20

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Solution

The fourth proportional to 15,391.20, 23,038.20 and 14,905.20 is: 22,310.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,391.20 : 23,038.20 = 14,905.20 : x
  2. Step 2: Convert to fraction form
    15,391.20/23,038.20 = 14,905.20/x
  3. Step 3: Cross multiply
    15,391.20x = 23,038.20 × 14,905.20
  4. Step 4: Simplify right side
    15,391.20x = 343,388,978.64
  5. Step 5: Solve for x
    x = 343,388,978.64/15,391.20
  6. Step 6: Final answer
    x = 22,310.73

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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.