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Finding the Fourth Proportional to 14,958.98, 20,642.84 and 8,991.20

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Solution

The fourth proportional to 14,958.98, 20,642.84 and 8,991.20 is: 12,407.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,958.98 : 20,642.84 = 8,991.20 : x
  2. Step 2: Convert to fraction form
    14,958.98/20,642.84 = 8,991.20/x
  3. Step 3: Cross multiply
    14,958.98x = 20,642.84 × 8,991.20
  4. Step 4: Simplify right side
    14,958.98x = 185,603,909.66
  5. Step 5: Solve for x
    x = 185,603,909.66/14,958.98
  6. Step 6: Final answer
    x = 12,407.53

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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.