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Finding the Fourth Proportional to 14,954.78, 20,638.51 and 8,240.40

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Solution

The fourth proportional to 14,954.78, 20,638.51 and 8,240.40 is: 11,372.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,954.78 : 20,638.51 = 8,240.40 : x
  2. Step 2: Convert to fraction form
    14,954.78/20,638.51 = 8,240.40/x
  3. Step 3: Cross multiply
    14,954.78x = 20,638.51 × 8,240.40
  4. Step 4: Simplify right side
    14,954.78x = 170,069,577.80
  5. Step 5: Solve for x
    x = 170,069,577.80/14,954.78
  6. Step 6: Final answer
    x = 11,372.26

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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.