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Finding the Fourth Proportional to 14,958.90, 20,640.87 and 8,670.06

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Solution

The fourth proportional to 14,958.90, 20,640.87 and 8,670.06 is: 11,963.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,958.90 : 20,640.87 = 8,670.06 : x
  2. Step 2: Convert to fraction form
    14,958.90/20,640.87 = 8,670.06/x
  3. Step 3: Cross multiply
    14,958.90x = 20,640.87 × 8,670.06
  4. Step 4: Simplify right side
    14,958.90x = 178,957,581.35
  5. Step 5: Solve for x
    x = 178,957,581.35/14,958.90
  6. Step 6: Final answer
    x = 11,963.28

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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.